diff --git a/.github/assets/fullscreen-viewer-icon.png b/.github/assets/fullscreen-viewer-icon.png
index 1db420b..ef75831 100644
Binary files a/.github/assets/fullscreen-viewer-icon.png and b/.github/assets/fullscreen-viewer-icon.png differ
diff --git a/.github/assets/fullscreen-viewer-showcase.png b/.github/assets/fullscreen-viewer-showcase.png
index 5bb8bd6..ce39552 100644
Binary files a/.github/assets/fullscreen-viewer-showcase.png and b/.github/assets/fullscreen-viewer-showcase.png differ
diff --git a/.github/assets/fullscreen-viewer-tags.png b/.github/assets/fullscreen-viewer-tags.png
new file mode 100644
index 0000000..9ccbac9
Binary files /dev/null and b/.github/assets/fullscreen-viewer-tags.png differ
diff --git a/.github/assets/staff-duplicates-diff.png b/.github/assets/staff-duplicates-diff.png
new file mode 100644
index 0000000..1ccd035
Binary files /dev/null and b/.github/assets/staff-duplicates-diff.png differ
diff --git a/.github/workflows/build-and-tests.yml b/.github/workflows/build-and-tests.yml
index a672dd9..85fac00 100644
--- a/.github/workflows/build-and-tests.yml
+++ b/.github/workflows/build-and-tests.yml
@@ -14,12 +14,12 @@ jobs:
         name: 'Run Unit Tests'
         runs-on: ubuntu-latest
         steps:
-            -   uses: actions/checkout@v4
+            -   uses: actions/checkout@v7
 
             -   name: Setup Node.js
-                uses: actions/setup-node@v4
+                uses: actions/setup-node@v6
                 with:
-                    node-version: '22'
+                    node-version: '25'
 
             -   name: Install npm dependencies
                 run: npm ci
diff --git a/.github/workflows/build-extensions.yml b/.github/workflows/build-extensions.yml
index 5885ba6..14d44ab 100644
--- a/.github/workflows/build-extensions.yml
+++ b/.github/workflows/build-extensions.yml
@@ -14,12 +14,12 @@ jobs:
     
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v4
+      uses: actions/checkout@v7
       
     - name: Setup Node.js
-      uses: actions/setup-node@v4
+      uses: actions/setup-node@v6
       with:
-        node-version: '20'
+        node-version: '25'
         cache: 'npm'
         
     - name: Install dependencies
@@ -39,7 +39,7 @@ jobs:
         zip -r "../${{ matrix.site }}-tagging-assistant-extension.zip" .
         
     - name: Upload extension artifact
-      uses: actions/upload-artifact@v4
+      uses: actions/upload-artifact@v7
       with:
         name: ${{ matrix.site }}-tagging-assistant-extension
         path: ${{ matrix.site }}-tagging-assistant-extension.zip
@@ -51,12 +51,12 @@ jobs:
     
     steps:
     - name: Download all artifacts
-      uses: actions/download-artifact@v4
+      uses: actions/download-artifact@v8
       with:
         path: artifacts
         
     - name: Create combined artifact
-      uses: actions/upload-artifact@v4
+      uses: actions/upload-artifact@v7
       with:
         name: all-extensions
         path: artifacts/
diff --git a/README.md b/README.md
index b238b8e..41fe42c 100644
--- a/README.md
+++ b/README.md
@@ -49,6 +49,11 @@ feature is opt-in and should be enabled in the settings first.
 
 ![Fullscreen Viewer Showcase](.github/assets/fullscreen-viewer-showcase.png)
 
+Fullscreen view now also has interface for quick addition and removal of tags. It will show both currently active 
+tagging profile and tags currently assigned to the image.
+
+![Fullscreen Viewer with Tags](.github/assets/fullscreen-viewer-tags.png)
+
 ## Building
 
 Recommendations on environment:
diff --git a/manifest.json b/manifest.json
index 795647e..1ea6f8b 100644
--- a/manifest.json
+++ b/manifest.json
@@ -1,7 +1,7 @@
 {
     "name": "Furbooru Tagging Assistant",
     "description": "Small experimental extension for slightly quicker tagging experience. Furbooru Edition.",
-    "version": "0.7.2",
+    "version": "0.8.0",
     "browser_specific_settings": {
         "gecko": {
             "id": "furbooru-tagging-assistant@thecore.city",
@@ -10,7 +10,8 @@
                     "none"
                 ]
             }
-        }
+        },
+        "gecko_android": {}
     },
     "icons": {
         "16": "icon16.png",
@@ -28,7 +29,8 @@
                 "*://*.furbooru.org/*"
             ],
             "js": [
-                "src/content/deps/amd.ts"
+                "src/content/deps/amd.ts",
+                "src/content/user-details.ts"
             ]
         },
         {
@@ -103,6 +105,18 @@
             "css": [
                 "src/styles/content/tag-presets.scss"
             ]
+        },
+        {
+            "matches": [
+                "*://*.furbooru.org/duplicate_reports",
+                "*://*.furbooru.org/duplicate_reports?*"
+            ],
+            "js": [
+                "src/content/duplicate-reports.ts"
+            ],
+            "css": [
+                "src/styles/content/duplicate-reports.scss"
+            ]
         }
     ],
     "action": {
diff --git a/package-lock.json b/package-lock.json
index a045ff1..bca9a2d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,33 +1,36 @@
 {
     "name": "furbooru-tagging-assistant",
-    "version": "0.7.2",
+    "version": "0.8.0",
     "lockfileVersion": 3,
     "requires": true,
     "packages": {
         "": {
             "name": "furbooru-tagging-assistant",
-            "version": "0.7.2",
+            "version": "0.8.0",
             "dependencies": {
-                "@fortawesome/fontawesome-free": "^7.2.0",
+                "@fortawesome/fontawesome-free": "^7.3.1",
                 "@sveltejs/adapter-static": "^3.0.10",
-                "@sveltejs/kit": "^2.65.0",
+                "@sveltejs/kit": "^2.70.3",
                 "amd-lite": "^1.0.1",
                 "lz-string": "^1.5.0",
-                "sass": "^1.101.0",
-                "svelte": "^5.56.3"
+                "sass": "^1.105.1",
+                "svelte": "^5.57.2"
             },
             "devDependencies": {
                 "@sveltejs/vite-plugin-svelte": "^6.2.4",
-                "@types/chrome": "^0.1.43",
-                "@types/node": "^25.9.3",
-                "@vitest/coverage-v8": "^4.1.8",
+                "@types/chrome": "^0.3.5",
+                "@types/node": "^25.9.9",
+                "@vitest/coverage-v8": "^4.1.11",
                 "cheerio": "^1.2.0",
                 "cross-env": "^10.1.0",
                 "jsdom": "^29.1.1",
-                "svelte-check": "^4.6.0",
+                "svelte-check": "^4.7.6",
                 "typescript": "^6.0.3",
-                "vite": "^7.3.5",
-                "vitest": "^4.1.8"
+                "vite": "^7.3.7",
+                "vitest": "^4.1.11"
+            },
+            "engines": {
+                "node": ">=25"
             }
         },
         "node_modules/@asamuzakjp/css-color": {
@@ -736,9 +739,9 @@
             }
         },
         "node_modules/@fortawesome/fontawesome-free": {
-            "version": "7.2.0",
-            "resolved": "https://registry.npmjs.org/@fortawesome/fontawesome-free/-/fontawesome-free-7.2.0.tgz",
-            "integrity": "sha512-3DguDv/oUE+7vjMeTSOjCSG+KeawgVQOHrKRnvUuqYh1mfArrh7s+s8hXW3e4RerBA1+Wh+hBqf8sJNpqNrBWg==",
+            "version": "7.3.1",
+            "resolved": "https://registry.npmjs.org/@fortawesome/fontawesome-free/-/fontawesome-free-7.3.1.tgz",
+            "integrity": "sha512-wmglKKPDIkgV3aWlZzWECCPoGIkYCulzBwxG9+w7rc5BGapZ6cPMpoPOT8k36J0Ni7PPX6c/rsoMWfS4d1MUMg==",
             "license": "(CC-BY-4.0 AND OFL-1.1 AND MIT)",
             "engines": {
                 "node": ">=6"
@@ -784,9 +787,9 @@
             }
         },
         "node_modules/@jridgewell/sourcemap-codec": {
-            "version": "1.5.5",
-            "resolved": "https://registry.npmjs.org/@jridgewell/sourcemap-codec/-/sourcemap-codec-1.5.5.tgz",
-            "integrity": "sha512-cYQ9310grqxueWbl+WuIUIaiUaDcj7WOq5fVhEljNVgRfOUhY9fy2zTvfoqWsnebh8Sl70VScFbICvJnLKB0Og==",
+            "version": "1.6.0",
+            "resolved": "https://registry.npmjs.org/@jridgewell/sourcemap-codec/-/sourcemap-codec-1.6.0.tgz",
+            "integrity": "sha512-T7jf+5zgsZHwNJ4lvQ7/aezbyk0nNX+zJVWpmHA7VYsEx7a7qr5Rg5IbtJFqkgze5Y2sruq1RUY8Q837Od7iFw==",
             "license": "MIT"
         },
         "node_modules/@jridgewell/trace-mapping": {
@@ -833,6 +836,178 @@
                 "@parcel/watcher-win32-x64": "2.5.0"
             }
         },
+        "node_modules/@parcel/watcher-android-arm64": {
+            "version": "2.5.0",
+            "resolved": "https://registry.npmjs.org/@parcel/watcher-android-arm64/-/watcher-android-arm64-2.5.0.tgz",
+            "integrity": "sha512-qlX4eS28bUcQCdribHkg/herLe+0A9RyYC+mm2PXpncit8z5b3nSqGVzMNR3CmtAOgRutiZ02eIJJgP/b1iEFQ==",
+            "cpu": [
+                "arm64"
+            ],
+            "license": "MIT",
+            "optional": true,
+            "os": [
+                "android"
+            ],
+            "engines": {
+                "node": ">= 10.0.0"
+            },
+            "funding": {
+                "type": "opencollective",
+                "url": "https://opencollective.com/parcel"
+            }
+        },
+        "node_modules/@parcel/watcher-darwin-arm64": {
+            "version": "2.5.0",
+            "resolved": "https://registry.npmjs.org/@parcel/watcher-darwin-arm64/-/watcher-darwin-arm64-2.5.0.tgz",
+            "integrity": "sha512-hyZ3TANnzGfLpRA2s/4U1kbw2ZI4qGxaRJbBH2DCSREFfubMswheh8TeiC1sGZ3z2jUf3s37P0BBlrD3sjVTUw==",
+            "cpu": [
+                "arm64"
+            ],
+            "license": "MIT",
+            "optional": true,
+            "os": [
+                "darwin"
+            ],
+            "engines": {
+                "node": ">= 10.0.0"
+            },
+            "funding": {
+                "type": "opencollective",
+                "url": "https://opencollective.com/parcel"
+            }
+        },
+        "node_modules/@parcel/watcher-darwin-x64": {
+            "version": "2.5.0",
+            "resolved": "https://registry.npmjs.org/@parcel/watcher-darwin-x64/-/watcher-darwin-x64-2.5.0.tgz",
+            "integrity": "sha512-9rhlwd78saKf18fT869/poydQK8YqlU26TMiNg7AIu7eBp9adqbJZqmdFOsbZ5cnLp5XvRo9wcFmNHgHdWaGYA==",
+            "cpu": [
+                "x64"
+            ],
+            "license": "MIT",
+            "optional": true,
+            "os": [
+                "darwin"
+            ],
+            "engines": {
+                "node": ">= 10.0.0"
+            },
+            "funding": {
+                "type": "opencollective",
+                "url": "https://opencollective.com/parcel"
+            }
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+        "node_modules/@parcel/watcher-freebsd-x64": {
+            "version": "2.5.0",
+            "resolved": "https://registry.npmjs.org/@parcel/watcher-freebsd-x64/-/watcher-freebsd-x64-2.5.0.tgz",
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+            "cpu": [
+                "x64"
+            ],
+            "license": "MIT",
+            "optional": true,
+            "os": [
+                "freebsd"
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+            "funding": {
+                "type": "opencollective",
+                "url": "https://opencollective.com/parcel"
+            }
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+        "node_modules/@parcel/watcher-linux-arm-glibc": {
+            "version": "2.5.0",
+            "resolved": "https://registry.npmjs.org/@parcel/watcher-linux-arm-glibc/-/watcher-linux-arm-glibc-2.5.0.tgz",
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+            "cpu": [
+                "arm"
+            ],
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+                "glibc"
+            ],
+            "license": "MIT",
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+            "cpu": [
+                "arm"
+            ],
+            "libc": [
+                "musl"
+            ],
+            "license": "MIT",
+            "optional": true,
+            "os": [
+                "linux"
+            ],
+            "engines": {
+                "node": ">= 10.0.0"
+            },
+            "funding": {
+                "type": "opencollective",
+                "url": "https://opencollective.com/parcel"
+            }
+        },
+        "node_modules/@parcel/watcher-linux-arm64-glibc": {
+            "version": "2.5.0",
+            "resolved": "https://registry.npmjs.org/@parcel/watcher-linux-arm64-glibc/-/watcher-linux-arm64-glibc-2.5.0.tgz",
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+            "cpu": [
+                "arm64"
+            ],
+            "libc": [
+                "glibc"
+            ],
+            "license": "MIT",
+            "optional": true,
+            "os": [
+                "linux"
+            ],
+            "engines": {
+                "node": ">= 10.0.0"
+            },
+            "funding": {
+                "type": "opencollective",
+                "url": "https://opencollective.com/parcel"
+            }
+        },
+        "node_modules/@parcel/watcher-linux-arm64-musl": {
+            "version": "2.5.0",
+            "resolved": "https://registry.npmjs.org/@parcel/watcher-linux-arm64-musl/-/watcher-linux-arm64-musl-2.5.0.tgz",
+            "integrity": "sha512-S1qARKOphxfiBEkwLUbHjCY9BWPdWnW9j7f7Hb2jPplu8UZ3nes7zpPOW9bkLbHRvWM0WDTsjdOTUgW0xLBN1Q==",
+            "cpu": [
+                "arm64"
+            ],
+            "libc": [
+                "musl"
+            ],
+            "license": "MIT",
+            "optional": true,
+            "os": [
+                "linux"
+            ],
+            "engines": {
+                "node": ">= 10.0.0"
+            },
+            "funding": {
+                "type": "opencollective",
+                "url": "https://opencollective.com/parcel"
+            }
+        },
         "node_modules/@parcel/watcher-linux-x64-glibc": {
             "version": "2.5.0",
             "cpu": [
@@ -869,6 +1044,66 @@
                 "url": "https://opencollective.com/parcel"
             }
         },
+        "node_modules/@parcel/watcher-win32-arm64": {
+            "version": "2.5.0",
+            "resolved": "https://registry.npmjs.org/@parcel/watcher-win32-arm64/-/watcher-win32-arm64-2.5.0.tgz",
+            "integrity": "sha512-twtft1d+JRNkM5YbmexfcH/N4znDtjgysFaV9zvZmmJezQsKpkfLYJ+JFV3uygugK6AtIM2oADPkB2AdhBrNig==",
+            "cpu": [
+                "arm64"
+            ],
+            "license": "MIT",
+            "optional": true,
+            "os": [
+                "win32"
+            ],
+            "engines": {
+                "node": ">= 10.0.0"
+            },
+            "funding": {
+                "type": "opencollective",
+                "url": "https://opencollective.com/parcel"
+            }
+        },
+        "node_modules/@parcel/watcher-win32-ia32": {
+            "version": "2.5.0",
+            "resolved": "https://registry.npmjs.org/@parcel/watcher-win32-ia32/-/watcher-win32-ia32-2.5.0.tgz",
+            "integrity": "sha512-+rgpsNRKwo8A53elqbbHXdOMtY/tAtTzManTWShB5Kk54N8Q9mzNWV7tV+IbGueCbcj826MfWGU3mprWtuf1TA==",
+            "cpu": [
+                "ia32"
+            ],
+            "license": "MIT",
+            "optional": true,
+            "os": [
+                "win32"
+            ],
+            "engines": {
+                "node": ">= 10.0.0"
+            },
+            "funding": {
+                "type": "opencollective",
+                "url": "https://opencollective.com/parcel"
+            }
+        },
+        "node_modules/@parcel/watcher-win32-x64": {
+            "version": "2.5.0",
+            "resolved": "https://registry.npmjs.org/@parcel/watcher-win32-x64/-/watcher-win32-x64-2.5.0.tgz",
+            "integrity": "sha512-lPrxve92zEHdgeff3aiu4gDOIt4u7sJYha6wbdEZDCDUhtjTsOMiaJzG5lMY4GkWH8p0fMmO2Ppq5G5XXG+DQw==",
+            "cpu": [
+                "x64"
+            ],
+            "license": "MIT",
+            "optional": true,
+            "os": [
+                "win32"
+            ],
+            "engines": {
+                "node": ">= 10.0.0"
+            },
+            "funding": {
+                "type": "opencollective",
+                "url": "https://opencollective.com/parcel"
+            }
+        },
         "node_modules/@polka/url": {
             "version": "1.0.0-next.28",
             "license": "MIT"
@@ -1205,9 +1440,9 @@
             "license": "MIT"
         },
         "node_modules/@sveltejs/acorn-typescript": {
-            "version": "1.0.10",
-            "resolved": "https://registry.npmjs.org/@sveltejs/acorn-typescript/-/acorn-typescript-1.0.10.tgz",
-            "integrity": "sha512-4WfKk68eTih+MiJD4fSbxN7E8kVBmTMPWHUPYjvl2N0rMs53YLTT8/YjKU5Dtnz5LqDjl7LEw4U7lXR2W3J5WA==",
+            "version": "1.0.13",
+            "resolved": "https://registry.npmjs.org/@sveltejs/acorn-typescript/-/acorn-typescript-1.0.13.tgz",
+            "integrity": "sha512-wgKggnhZVL9Bfx1OaKKTrYY9BFRk6C8UAkQNUcIv1+llzYrIqy+RZm5HPKzn0NpEBvTVhTqB4kQyllZywsRBRQ==",
             "license": "MIT",
             "peerDependencies": {
                 "acorn": "^8.9.0"
@@ -1223,9 +1458,9 @@
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         "node_modules/@sveltejs/kit": {
-            "version": "2.65.0",
-            "resolved": "https://registry.npmjs.org/@sveltejs/kit/-/kit-2.65.0.tgz",
-            "integrity": "sha512-nUWJ4dSKNo8mIOh+HTL+XyRj8FX9Dyb1ayBxj4q9+WrTJfn4jfTt21p3WUFTnnmdnt9xAXpBKLQ+H9y41x0X7Q==",
+            "version": "2.70.3",
+            "resolved": "https://registry.npmjs.org/@sveltejs/kit/-/kit-2.70.3.tgz",
+            "integrity": "sha512-UDvEYuZqAMbfB/oXIoqKvbKcb7YczK5zYrzmsGV1zRJk03jntwp8dXiYoIJotxAndsKvcPFtx9H1GRSKFdSHgg==",
             "license": "MIT",
             "dependencies": {
                 "@standard-schema/spec": "^1.0.0",
@@ -1264,9 +1499,9 @@
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-            "resolved": "https://registry.npmjs.org/@sveltejs/load-config/-/load-config-0.1.1.tgz",
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+            "version": "0.2.3",
+            "resolved": "https://registry.npmjs.org/@sveltejs/load-config/-/load-config-0.2.3.tgz",
+            "integrity": "sha512-VT3qmUb8pRV2QrZjd8iAmtg8lf4W0TIjZbvXtz5MKei/q96teWZgGJyyidJzOjzZzvdq616eSRVeMYIQChUTAQ==",
             "dev": true,
             "license": "MIT",
             "engines": {
@@ -1322,9 +1557,9 @@
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-            "version": "0.1.43",
-            "resolved": "https://registry.npmjs.org/@types/chrome/-/chrome-0.1.43.tgz",
-            "integrity": "sha512-ukH/HhmR6ht+UTX3PLUWJxgJ/RQcK2Foj4lBzsF24SIWsXgqhGuXqjd8FFuwioPP7d/JUKLM4g8GZxw3F4HTcA==",
+            "version": "0.3.5",
+            "resolved": "https://registry.npmjs.org/@types/chrome/-/chrome-0.3.5.tgz",
+            "integrity": "sha512-7HYsK7xalNxzLwGrP9lkCQPAA6V56VtPpOmv2CQnBnMzX5/Hpr+Iv5fqaIOIY/H/Q6ZBksLmurWh7zXPcZ4B7Q==",
             "dev": true,
             "license": "MIT",
             "dependencies": {
@@ -1368,30 +1603,24 @@
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         },
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-            "optional": true,
-            "os": [
-                "linux"
-            ],
-            "peer": true,
-            "engines": {
-                "node": ">= 12.0.0"
-            },
-            "funding": {
-                "type": "opencollective",
-                "url": "https://opencollective.com/parcel"
-            }
-        },
-        "node_modules/lightningcss-win32-arm64-msvc": {
-            "version": "1.32.0",
-            "resolved": "https://registry.npmjs.org/lightningcss-win32-arm64-msvc/-/lightningcss-win32-arm64-msvc-1.32.0.tgz",
-            "integrity": "sha512-8SbC8BR40pS6baCM8sbtYDSwEVQd4JlFTOlaD3gWGHfThTcABnNDBda6eTZeqbofalIJhFx0qKzgHJmcPTnGdw==",
-            "cpu": [
-                "arm64"
-            ],
-            "license": "MPL-2.0",
-            "optional": true,
-            "os": [
-                "win32"
-            ],
-            "peer": true,
-            "engines": {
-                "node": ">= 12.0.0"
-            },
-            "funding": {
-                "type": "opencollective",
-                "url": "https://opencollective.com/parcel"
-            }
-        },
-        "node_modules/lightningcss-win32-x64-msvc": {
-            "version": "1.32.0",
-            "resolved": "https://registry.npmjs.org/lightningcss-win32-x64-msvc/-/lightningcss-win32-x64-msvc-1.32.0.tgz",
-            "integrity": "sha512-Amq9B/SoZYdDi1kFrojnoqPLxYhQ4Wo5XiL8EVJrVsB8ARoC1PWW6VGtT0WKCemjy8aC+louJnjS7U18x3b06Q==",
-            "cpu": [
-                "x64"
-            ],
-            "license": "MPL-2.0",
-            "optional": true,
-            "os": [
-                "win32"
-            ],
-            "peer": true,
-            "engines": {
-                "node": ">= 12.0.0"
-            },
-            "funding": {
-                "type": "opencollective",
-                "url": "https://opencollective.com/parcel"
-            }
-        },
-        "node_modules/lightningcss/node_modules/detect-libc": {
-            "version": "2.1.2",
-            "resolved": "https://registry.npmjs.org/detect-libc/-/detect-libc-2.1.2.tgz",
-            "integrity": "sha512-Btj2BOOO83o3WyH59e8MgXsxEQVcarkUOpEYrubB0urwnN10yQ364rsiByU11nZlqWYZm05i/of7io4mzihBtQ==",
-            "license": "Apache-2.0",
-            "optional": true,
-            "peer": true,
-            "engines": {
-                "node": ">=8"
-            }
-        },
         "node_modules/locate-character": {
             "version": "3.0.0",
             "license": "MIT"
@@ -2893,9 +2849,9 @@
             "license": "MIT"
         },
         "node_modules/sass": {
-            "version": "1.101.0",
-            "resolved": "https://registry.npmjs.org/sass/-/sass-1.101.0.tgz",
-            "integrity": "sha512-OL3GoQyoUdDt843DpVmDO6y2k1sc5IhUDSpu8XucEI+35neq5QivZ1iuegnpraEVTJXlQGK1gl27zKcTLEPbQw==",
+            "version": "1.105.1",
+            "resolved": "https://registry.npmjs.org/sass/-/sass-1.105.1.tgz",
+            "integrity": "sha512-1CnAWPyrrnVQzXGB/DUep1vYCKCm1CIBr+YxjjiW6wk9qtzemnGP4qicH56T2F9S4Hjtv/Ne3jDz8JqfdDU4oA==",
             "license": "MIT",
             "dependencies": {
                 "chokidar": "^5.0.0",
@@ -3049,23 +3005,22 @@
             }
         },
         "node_modules/svelte": {
-            "version": "5.56.3",
-            "resolved": "https://registry.npmjs.org/svelte/-/svelte-5.56.3.tgz",
-            "integrity": "sha512-w7JvrM5IFl5cmfbY0TLik9o7mjRUJmRMhOR51tBPu708Gr/MjbGs7VnJnr/B0CaXeI4vtnOh7RKxDr0cwhMdDA==",
+            "version": "5.57.2",
+            "resolved": "https://registry.npmjs.org/svelte/-/svelte-5.57.2.tgz",
+            "integrity": "sha512-1YiPCAXT0Ct6g1vOMmSLa0Nsc3QRMvtDF32ihgglGVrugIuIK38RyDiFNXVDhtQ81TJjSO57NdMw6DyYLqSGDQ==",
             "license": "MIT",
             "dependencies": {
-                "@jridgewell/remapping": "^2.3.4",
-                "@jridgewell/sourcemap-codec": "^1.5.0",
-                "@sveltejs/acorn-typescript": "^1.0.10",
-                "@types/estree": "^1.0.5",
-                "@types/trusted-types": "^2.0.7",
-                "acorn": "^8.12.1",
+                "@jridgewell/remapping": "^2.3.5",
+                "@jridgewell/sourcemap-codec": "^1.6.0",
+                "@sveltejs/acorn-typescript": "^1.0.13",
+                "@types/estree": "^1.0.9",
+                "acorn": "^8.18.0",
                 "aria-query": "5.3.1",
                 "axobject-query": "^4.1.0",
                 "clsx": "^2.1.1",
-                "devalue": "^5.8.1",
+                "devalue": "^5.9.2",
                 "esm-env": "^1.2.1",
-                "esrap": "^2.2.11",
+                "esrap": "^2.3.6",
                 "is-reference": "^3.0.3",
                 "locate-character": "^3.0.0",
                 "magic-string": "^0.30.11",
@@ -3076,14 +3031,14 @@
             }
         },
         "node_modules/svelte-check": {
-            "version": "4.6.0",
-            "resolved": "https://registry.npmjs.org/svelte-check/-/svelte-check-4.6.0.tgz",
-            "integrity": "sha512-KhVnDFDSid57mmZtHz8gfW8AAGylOZ0vPnOIzVmAL+urzwK8sBYXRss953gD8T0OdgAQ11mdWhE6uadmtOz8TQ==",
+            "version": "4.7.6",
+            "resolved": "https://registry.npmjs.org/svelte-check/-/svelte-check-4.7.6.tgz",
+            "integrity": "sha512-t2scM//ZuVbSY/T2w6FSBw1v9s2NEmh/g+sy1lqtosW5ylBV5AF4wFb1Ts9Kf3MbfPDUDJDZ9L436YT0SPTdvw==",
             "dev": true,
             "license": "MIT",
             "dependencies": {
                 "@jridgewell/trace-mapping": "^0.3.25",
-                "@sveltejs/load-config": "0.1.1",
+                "@sveltejs/load-config": "^0.2.3",
                 "chokidar": "^4.0.1",
                 "fdir": "^6.2.0",
                 "picocolors": "^1.0.0",
@@ -3097,7 +3052,7 @@
             },
             "peerDependencies": {
                 "svelte": "^4.0.0 || ^5.0.0-next.0",
-                "typescript": ">=5.0.0"
+                "typescript": "^5.0.0 || ^6.0.0"
             }
         },
         "node_modules/svelte-check/node_modules/fdir": {
@@ -3114,19 +3069,11 @@
                 }
             }
         },
-        "node_modules/svelte-check/node_modules/picomatch": {
-            "version": "4.0.2",
-            "resolved": "https://registry.npmjs.org/picomatch/-/picomatch-4.0.2.tgz",
-            "integrity": "sha512-M7BAV6Rlcy5u+m6oPhAPFgJTzAioX/6B0DxyvDlo9l8+T3nLKbrczg2WLUyzd45L8RqfUMyGPzekbMvX2Ldkwg==",
-            "dev": true,
-            "optional": true,
-            "peer": true,
-            "engines": {
-                "node": ">=12"
-            },
-            "funding": {
-                "url": "https://github.com/sponsors/jonschlinkert"
-            }
+        "node_modules/svelte/node_modules/@types/estree": {
+            "version": "1.0.9",
+            "resolved": "https://registry.npmjs.org/@types/estree/-/estree-1.0.9.tgz",
+            "integrity": "sha512-GhdPgy1el4/ImP05X05Uw4cw2/M93BCUmnEvWZNStlCzEKME4Fkk+YpoA5OiHNQmoS7Cafb8Xa3Pya8m1Qrzeg==",
+            "license": "MIT"
         },
         "node_modules/symbol-tree": {
             "version": "3.2.4",
@@ -3303,12 +3250,12 @@
             "license": "MIT"
         },
         "node_modules/vite": {
-            "version": "7.3.5",
-            "resolved": "https://registry.npmjs.org/vite/-/vite-7.3.5.tgz",
-            "integrity": "sha512-KuOaNhcnGFN2zIPGA7wRmzF+lJA1sea7rHq17aiJ++9lzY1WWG6Jpwqwe1KNbRVPIqHmr8GLYx7jbrQcN/7/ww==",
+            "version": "7.3.7",
+            "resolved": "https://registry.npmjs.org/vite/-/vite-7.3.7.tgz",
+            "integrity": "sha512-AHEzTORMbi7/7aXp7w7KZ5+DCUdSeLsJz0grY8xHpc9DHdYb0vQu6DqJfm2tOw3gDExNgPgnJTXxM6syYFHaCA==",
             "license": "MIT",
             "dependencies": {
-                "esbuild": "^0.27.0",
+                "esbuild": "^0.27.0 || ^0.28.0",
                 "fdir": "^6.5.0",
                 "picomatch": "^4.0.3",
                 "postcss": "^8.5.6",
@@ -3425,19 +3372,19 @@
             }
         },
         "node_modules/vitest": {
-            "version": "4.1.8",
-            "resolved": "https://registry.npmjs.org/vitest/-/vitest-4.1.8.tgz",
-            "integrity": "sha512-flY6ScbCIt9HThs+C5HS7jvGOB560DJtk/Z15IQROTA6zEy49Nh8T/dofWTQL+n3vswqn87sbJNiuqw1SDp5Ig==",
+            "version": "4.1.11",
+            "resolved": "https://registry.npmjs.org/vitest/-/vitest-4.1.11.tgz",
+            "integrity": "sha512-fhACrNXUidIbGSBr5FlbuBkO7VWC1ZyLl0DO4CU2DrQoAPxX84Ysxs+HeGQpii5lZWV1Q4gBZTTu49mF+A6Edw==",
             "dev": true,
             "license": "MIT",
             "dependencies": {
-                "@vitest/expect": "4.1.8",
-                "@vitest/mocker": "4.1.8",
-                "@vitest/pretty-format": "4.1.8",
-                "@vitest/runner": "4.1.8",
-                "@vitest/snapshot": "4.1.8",
-                "@vitest/spy": "4.1.8",
-                "@vitest/utils": "4.1.8",
+                "@vitest/expect": "4.1.11",
+                "@vitest/mocker": "4.1.11",
+                "@vitest/pretty-format": "4.1.11",
+                "@vitest/runner": "4.1.11",
+                "@vitest/snapshot": "4.1.11",
+                "@vitest/spy": "4.1.11",
+                "@vitest/utils": "4.1.11",
                 "es-module-lexer": "^2.0.0",
                 "expect-type": "^1.3.0",
                 "magic-string": "^0.30.21",
@@ -3465,12 +3412,12 @@
                 "@edge-runtime/vm": "*",
                 "@opentelemetry/api": "^1.9.0",
                 "@types/node": "^20.0.0 || ^22.0.0 || >=24.0.0",
-                "@vitest/browser-playwright": "4.1.8",
-                "@vitest/browser-preview": "4.1.8",
-                "@vitest/browser-webdriverio": "4.1.8",
-                "@vitest/coverage-istanbul": "4.1.8",
-                "@vitest/coverage-v8": "4.1.8",
-                "@vitest/ui": "4.1.8",
+                "@vitest/browser-playwright": "4.1.11",
+                "@vitest/browser-preview": "4.1.11",
+                "@vitest/browser-webdriverio": "4.1.11",
+                "@vitest/coverage-istanbul": "4.1.11",
+                "@vitest/coverage-v8": "4.1.11",
+                "@vitest/ui": "4.1.11",
                 "happy-dom": "*",
                 "jsdom": "*",
                 "vite": "^6.0.0 || ^7.0.0 || ^8.0.0"
diff --git a/package.json b/package.json
index 6aa55c8..b879a03 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
     "name": "furbooru-tagging-assistant",
-    "version": "0.7.2",
+    "version": "0.8.0",
     "private": true,
     "type": "module",
     "scripts": {
@@ -16,24 +16,27 @@
     },
     "dependencies": {
         "@sveltejs/adapter-static": "^3.0.10",
-        "@sveltejs/kit": "^2.65.0",
-        "@fortawesome/fontawesome-free": "^7.2.0",
+        "@sveltejs/kit": "^2.70.3",
+        "@fortawesome/fontawesome-free": "^7.3.1",
         "amd-lite": "^1.0.1",
         "lz-string": "^1.5.0",
-        "sass": "^1.101.0",
-        "svelte": "^5.56.3"
+        "sass": "^1.105.1",
+        "svelte": "^5.57.2"
     },
     "devDependencies": {
         "@sveltejs/vite-plugin-svelte": "^6.2.4",
-        "@types/chrome": "^0.1.43",
-        "@types/node": "^25.9.3",
-        "@vitest/coverage-v8": "^4.1.8",
+        "@types/chrome": "^0.3.5",
+        "@types/node": "^25.9.9",
+        "@vitest/coverage-v8": "^4.1.11",
         "cheerio": "^1.2.0",
         "cross-env": "^10.1.0",
         "jsdom": "^29.1.1",
-        "svelte-check": "^4.6.0",
+        "svelte-check": "^4.7.6",
         "typescript": "^6.0.3",
-        "vite": "^7.3.5",
-        "vitest": "^4.1.8"
+        "vite": "^7.3.7",
+        "vitest": "^4.1.11"
+    },
+    "engines": {
+        "node": ">=25"
     }
 }
diff --git a/src/config/tags.ts b/src/config/tags.ts
index 2065e88..34080d8 100644
--- a/src/config/tags.ts
+++ b/src/config/tags.ts
@@ -1,18 +1,24 @@
+/**
+ * Enum-like object with categories used by the Philomena, available for calling in the code. Values are technical
+ * names of these categories.
+ */
+export const CategoriesEnum = {
+  Rating: 'rating',
+  Spoiler: 'spoiler',
+  Origin: 'origin',
+  OC: 'oc',
+  Error: 'error',
+  Character: 'character',
+  ContentOfficial: 'content-official',
+  ContentFanmade: 'content-fanmade',
+  Species: 'species',
+  BodyType: 'body-type',
+}
+
 /**
  * List of categories defined by the sites.
  */
-export const categories: string[] = [
-  'rating',
-  'spoiler',
-  'origin',
-  'oc',
-  'error',
-  'character',
-  'content-official',
-  'content-fanmade',
-  'species',
-  'body-type',
-];
+export const categories: string[] = Object.values(CategoriesEnum);
 
 /**
  * Mapping of namespaces to their respective categories. These namespaces are automatically assigned to them, so we can
@@ -23,21 +29,21 @@ export const categories: string[] = [
  * @see https://github.com/philomena-dev/philomena/blob/6086757b654da8792ae52adb2a2f501ea6c30d12/lib/philomena/tags/tag.ex#L33-L45
  */
 export const namespaceCategories: Map<string, string> = new Map([
-  ['artist', 'origin'],
-  ['art pack', 'content-fanmade'],
-  ['colorist', 'origin'],
-  ['comic', 'content-fanmade'],
-  ['editor', 'origin'],
-  ['fanfic', 'content-fanmade'],
-  ['oc', 'oc'],
-  ['photographer', 'origin'],
-  ['series', 'content-fanmade'],
-  ['spoiler', 'spoiler'],
-  ['video', 'content-fanmade'],
-  ...(__CURRENT_SITE__ === 'tantabus' ? <const> [
-    ["prompter", "origin"],
-    ["creator", "origin"],
-    ["generator", "origin"]
+  ['artist', CategoriesEnum.Origin],
+  ['art pack', CategoriesEnum.ContentFanmade],
+  ['colorist', CategoriesEnum.Origin],
+  ['comic', CategoriesEnum.ContentFanmade],
+  ['editor', CategoriesEnum.Origin],
+  ['fanfic', CategoriesEnum.ContentFanmade],
+  ['oc', CategoriesEnum.OC],
+  ['photographer', CategoriesEnum.Origin],
+  ['series', CategoriesEnum.ContentFanmade],
+  ['spoiler', CategoriesEnum.Spoiler],
+  ['video', CategoriesEnum.ContentFanmade],
+  ...(__CURRENT_SITE__ === 'tantabus' ? <const>[
+    ["prompter", CategoriesEnum.Origin],
+    ["creator", CategoriesEnum.Origin],
+    ["generator", CategoriesEnum.Origin]
   ] : [])
 ]);
 
@@ -128,3 +134,15 @@ export const tagsBlacklist: string[] = (__CURRENT_SITE__ === 'furbooru' ? [
   "solo oc",
   "tag your shit"
 ]);
+
+/**
+ * Core rating tags used in the Philomena. These rarely change, so they're pretty safe to hardcode into the source code.
+ */
+export const ratingTags: string[] = [
+  'safe',
+  'suggestive',
+  'questionable',
+  'explicit',
+  'grimdark',
+  'grotesque',
+];
diff --git a/src/content/components/events/comms.ts b/src/content/components/events/comms.ts
index e5ba62a..643cae2 100644
--- a/src/content/components/events/comms.ts
+++ b/src/content/components/events/comms.ts
@@ -5,6 +5,7 @@ import type { BooruEventsMap } from "$content/components/events/booru-events";
 import type { TagsFormEventsMap } from "$content/components/events/tags-form-events";
 import type { TagDropdownEvents } from "$content/components/events/tag-dropdown-events";
 import type { PresetBlockEventsMap } from "$content/components/events/preset-block-events";
+import type { TagsListTogglerEventsMap } from "$content/components/events/tags-list-toggler-events";
 
 type EventsMapping =
   TaggingProfilePopupEventsMap
@@ -12,7 +13,8 @@ type EventsMapping =
   & BooruEventsMap
   & TagsFormEventsMap
   & TagDropdownEvents
-  & PresetBlockEventsMap;
+  & PresetBlockEventsMap
+  & TagsListTogglerEventsMap;
 
 type EventCallback<EventDetails> = (event: CustomEvent<EventDetails>) => void;
 export type UnsubscribeFunction = () => void;
diff --git a/src/content/components/events/tags-list-toggler-events.ts b/src/content/components/events/tags-list-toggler-events.ts
new file mode 100644
index 0000000..824fca1
--- /dev/null
+++ b/src/content/components/events/tags-list-toggler-events.ts
@@ -0,0 +1,5 @@
+export const EVENT_TAG_TOGGLED = 'tag-toggled';
+
+export interface TagsListTogglerEventsMap {
+  [EVENT_TAG_TOGGLED]: [string, boolean];
+}
diff --git a/src/content/components/extension/FullscreenViewer.ts b/src/content/components/extension/FullscreenViewer.ts
index 616acdf..dad4ab5 100644
--- a/src/content/components/extension/FullscreenViewer.ts
+++ b/src/content/components/extension/FullscreenViewer.ts
@@ -1,28 +1,62 @@
 import { BaseComponent } from "$content/components/base/BaseComponent";
 import MiscPreferences, { type FullscreenViewerSize } from "$lib/extension/preferences/MiscPreferences";
-import { emit, on } from "$content/components/events/comms";
+import { emit, on, type UnsubscribeFunction } from "$content/components/events/comms";
 import { EVENT_SIZE_LOADED } from "$content/components/events/fullscreen-viewer-events";
+import type { MediaBox } from "$content/components/philomena/MediaBox";
+import TagsListToggler from "$content/components/extension/profiles/TagsListToggler";
+import { EVENT_ACTIVE_PROFILE_CHANGED } from "$content/components/events/tagging-profile-popup-events";
+import type TaggingProfile from "$entities/TaggingProfile";
+import { EVENT_TAG_TOGGLED } from "$content/components/events/tags-list-toggler-events";
+import type { TaggingProfilePopup } from "$content/components/extension/profiles/TaggingProfilePopup";
 
 export class FullscreenViewer extends BaseComponent {
+  #currentMediaBox: MediaBox | null = null;
   #videoElement: HTMLVideoElement = document.createElement('video');
   #imageElement: HTMLImageElement = document.createElement('img');
   #spinnerElement: HTMLElement = document.createElement('i');
   #sizeSelectorElement: HTMLSelectElement = document.createElement('select');
   #closeButtonElement: HTMLElement = document.createElement('i');
+  #tagsPopupElement: HTMLElement = document.createElement('div');
+  #imageTagsToggler: TagsListToggler = TagsListToggler.create();
+  #profileTagsToggler: TagsListToggler = TagsListToggler.create();
+  #tagsPopupHider: HTMLElement = document.createElement('div');
+  #activeProfileListenerUnsubscriber: UnsubscribeFunction | null = null;
   #touchId: number | null = null;
   #startX: number | null = null;
   #startY: number | null = null;
   #isClosingSwipeStarted: boolean | null = null;
   #isSizeFetched: boolean = false;
-  #currentURIs: App.ImageURIs | null = null;
 
   protected build() {
     this.container.classList.add('fullscreen-viewer');
 
+    this.#imageTagsToggler.initialize();
+    this.#profileTagsToggler.initialize();
+
+    const overflowContainer = document.createElement('div');
+    overflowContainer.classList.add('tags-panel__scroller');
+
+    overflowContainer.append(
+      this.#profileTagsToggler.container,
+      document.createElement('hr'),
+      this.#imageTagsToggler.container,
+    );
+
+    this.#tagsPopupElement.append(
+      this.#tagsPopupHider,
+      overflowContainer,
+    );
+
+    this.#tagsPopupHider.classList.add('tags-panel__toggle');
+    this.#tagsPopupHider.textContent = 'Toggle Tags';
+
+    this.#tagsPopupElement.classList.add('tags-panel');
+
     this.container.append(
       this.#spinnerElement,
       this.#sizeSelectorElement,
       this.#closeButtonElement,
+      this.#tagsPopupElement,
     );
 
     this.#spinnerElement.classList.add('spinner', 'fa', 'fa-circle-notch', 'fa-spin');
@@ -52,11 +86,20 @@ export class FullscreenViewer extends BaseComponent {
     this.#videoElement.addEventListener('loadeddata', this.#onLoaded.bind(this));
     this.#imageElement.addEventListener('load', this.#onLoaded.bind(this));
     this.#sizeSelectorElement.addEventListener('click', event => event.stopPropagation());
+    this.#tagsPopupElement.addEventListener('click', event => event.stopPropagation());
+    this.#tagsPopupHider.addEventListener('click', () => this.#togglePopupVisibility());
 
     FullscreenViewer.#preferences
       .fullscreenViewerSize.get()
       .then(this.#onSizeResolved.bind(this))
       .then(this.#watchForSizeSelectionChanges.bind(this));
+
+    FullscreenViewer.#preferences
+      .fullscreenViewerPopupShown.get()
+      .then(this.#togglePopupVisibility.bind(this));
+
+    on(this.#profileTagsToggler, EVENT_TAG_TOGGLED, this.#onTagToggled.bind(this));
+    on(this.#imageTagsToggler, EVENT_TAG_TOGGLED, this.#onTagToggled.bind(this));
   }
 
   #onLoaded() {
@@ -193,8 +236,8 @@ export class FullscreenViewer extends BaseComponent {
     this.#sizeSelectorElement.addEventListener('input', () => {
       const targetSize = this.#sizeSelectorElement.value;
 
-      if (this.#currentURIs) {
-        void this.show(this.#currentURIs);
+      if (this.#currentMediaBox) {
+        void this.show(this.#currentMediaBox);
       }
 
       if (!targetSize || targetSize === lastActiveSize || !(targetSize in FullscreenViewer.#previewSizes)) {
@@ -206,8 +249,55 @@ export class FullscreenViewer extends BaseComponent {
     });
   }
 
+  #onTagToggled(event: CustomEvent<[string, boolean]>) {
+    const sourceTogglerContainer = event.currentTarget;
+
+    if (!(sourceTogglerContainer instanceof HTMLElement)) {
+      return;
+    }
+
+    if (sourceTogglerContainer !== this.#imageTagsToggler.container) {
+      this.#imageTagsToggler.refreshStateFromChanges();
+    }
+
+    if (sourceTogglerContainer !== this.#profileTagsToggler.container) {
+      this.#profileTagsToggler.refreshStateFromChanges();
+    }
+
+    this.#currentMediaBox?.tools?.popup?.tagsToggler.refreshStateFromChanges();
+  }
+
+  #onActiveProfileChanged(eventOrTaggingProfile: CustomEvent<TaggingProfile | null> | TaggingProfile | null) {
+    let resolvedActiveTaggingProfile: TaggingProfile | null = null;
+
+    if (eventOrTaggingProfile instanceof CustomEvent) {
+      resolvedActiveTaggingProfile = eventOrTaggingProfile.detail;
+    } else {
+      resolvedActiveTaggingProfile = eventOrTaggingProfile;
+    }
+
+    this.#profileTagsToggler.container.classList.toggle('is-hidden', !resolvedActiveTaggingProfile);
+
+    if (!resolvedActiveTaggingProfile) {
+      return;
+    }
+
+    const uniqueTagsSet = this.#currentMediaBox?.uniqueTagsSet;
+
+    this.#profileTagsToggler.replaceTags(resolvedActiveTaggingProfile.settings.tags, uniqueTagsSet ?? new Set());
+  }
+
   #close() {
-    this.#currentURIs = null;
+    const taggingPopup = this.#currentMediaBox?.tools?.popup;
+
+    if (taggingPopup) {
+      this.#activeProfileListenerUnsubscriber?.();
+
+      taggingPopup.tagsToggler.disconnectChangeSet();
+      taggingPopup.toggleSubmissionLock(false);
+    }
+
+    this.#currentMediaBox = null;
 
     this.container.classList.remove(FullscreenViewer.#shownState);
     document.body.style.removeProperty('overflow');
@@ -247,16 +337,23 @@ export class FullscreenViewer extends BaseComponent {
     return imageUris[targetSize as FullscreenViewerSize];
   }
 
-  async show(imageUris: App.ImageURIs): Promise<void> {
-    this.#currentURIs = imageUris;
+  async show(mediaBox: MediaBox): Promise<void> {
+    const isSameMediaBox = this.#currentMediaBox === mediaBox;
+    this.#currentMediaBox = mediaBox;
 
-    const url = await this.#resolveCurrentSelectedSizeUrl(imageUris);
+    const url = await this.#resolveCurrentSelectedSizeUrl(mediaBox.imageLinks);
 
     if (!url) {
       console.warn('Failed to resolve media for the viewer!');
       return;
     }
 
+    const taggingPopup = mediaBox?.tools?.popup;
+
+    if (taggingPopup && !isSameMediaBox) {
+      this.#connectAndRefreshTagTogglers(taggingPopup, mediaBox);
+    }
+
     this.container.classList.add('loading');
 
     requestAnimationFrame(() => {
@@ -285,6 +382,45 @@ export class FullscreenViewer extends BaseComponent {
     this.container.append(this.#imageElement);
   }
 
+  /**
+   * When connecting to the new popup, we need to connect the tag editor inside the fullscreen viewer to the original
+   * popup, since submission is still being sent from the popup inside media box.
+   * @param taggingPopup
+   * @param mediaBox
+   * @private
+   */
+  #connectAndRefreshTagTogglers(taggingPopup: TaggingProfilePopup, mediaBox: MediaBox) {
+    taggingPopup.toggleSubmissionLock(true);
+
+    const sourceToggler = taggingPopup.tagsToggler;
+    sourceToggler.connectChangeSet(this.#profileTagsToggler);
+    sourceToggler.connectChangeSet(this.#imageTagsToggler);
+
+    const uniqueTagsSet = mediaBox.uniqueTagsSet ?? new Set();
+    const uniqueTags = Array.from(uniqueTagsSet);
+
+    this.#imageTagsToggler.replaceTags(uniqueTags, uniqueTagsSet);
+
+    this.#activeProfileListenerUnsubscriber?.();
+    this.#activeProfileListenerUnsubscriber = on(
+      taggingPopup,
+      EVENT_ACTIVE_PROFILE_CHANGED,
+      this.#onActiveProfileChanged.bind(this),
+    );
+
+    this.#onActiveProfileChanged(taggingPopup.activeProfile);
+  }
+
+  #togglePopupVisibility(maybeState: boolean | undefined = undefined) {
+    if (typeof maybeState === 'undefined') {
+      const isHidden = this.#tagsPopupElement.classList.toggle(FullscreenViewer.#collapsedPopupState);
+      void FullscreenViewer.#preferences.fullscreenViewerPopupShown.set(!isHidden);
+      return;
+    }
+
+    this.#tagsPopupElement.classList.toggle(FullscreenViewer.#collapsedPopupState, !maybeState);
+  }
+
   static #isVideoUrl(url: string): boolean {
     return url.endsWith('.mp4') || url.endsWith('.webm');
   }
@@ -296,6 +432,7 @@ export class FullscreenViewer extends BaseComponent {
   static #shownState = 'shown';
   static #swipeState = 'swiped';
   static #minRequiredDistance = 50;
+  static #collapsedPopupState = 'is-collapsed';
 
   static #previewSizes: Record<FullscreenViewerSize, string> = {
     full: 'Full',
diff --git a/src/content/components/extension/ImageShowFullscreenButton.ts b/src/content/components/extension/ImageShowFullscreenButton.ts
index 25422a8..6d21c91 100644
--- a/src/content/components/extension/ImageShowFullscreenButton.ts
+++ b/src/content/components/extension/ImageShowFullscreenButton.ts
@@ -45,15 +45,13 @@ export class ImageShowFullscreenButton extends BaseComponent {
   }
 
   #onButtonClicked() {
-    const imageLinks = this.#mediaBoxTools?.mediaBox?.imageLinks;
+    const mediaBox = this.#mediaBoxTools?.mediaBox;
 
-    if (!imageLinks) {
+    if (!mediaBox) {
       throw new Error('Failed to resolve image links from media box tools!');
     }
 
-    ImageShowFullscreenButton
-      .#resolveViewer()
-      ?.show(imageLinks);
+    ImageShowFullscreenButton.#resolveViewer()?.show(mediaBox);
   }
 
   static create(): HTMLElement {
diff --git a/src/content/components/extension/MediaBoxTools.ts b/src/content/components/extension/MediaBoxTools.ts
index 1de65b7..7ea50a6 100644
--- a/src/content/components/extension/MediaBoxTools.ts
+++ b/src/content/components/extension/MediaBoxTools.ts
@@ -50,6 +50,10 @@ export class MediaBoxTools extends BaseComponent {
     return this.#mediaBox;
   }
 
+  get popup(): TaggingProfilePopup | null {
+    return this.#popup;
+  }
+
   /**
    * Create a maintenance popup element.
    * @param childrenElements List of children elements to append to the component.
diff --git a/src/content/components/extension/profiles/TaggingProfilePopup.ts b/src/content/components/extension/profiles/TaggingProfilePopup.ts
index 0b912cd..b332279 100644
--- a/src/content/components/extension/profiles/TaggingProfilePopup.ts
+++ b/src/content/components/extension/profiles/TaggingProfilePopup.ts
@@ -4,31 +4,22 @@ import { BaseComponent } from "$content/components/base/BaseComponent";
 import { getComponent } from "$content/components/base/component-utils";
 import ScrapedAPI from "$lib/philomena/scraping/ScrapedAPI";
 import { tagsBlacklist } from "$config/tags";
-import { emitterAt } from "$content/components/events/comms";
+import { emitterAt, on } from "$content/components/events/comms";
 import {
   EVENT_ACTIVE_PROFILE_CHANGED,
   EVENT_PROFILE_POPUP_STATE_CHANGED,
   EVENT_TAGS_UPDATED
 } from "$content/components/events/tagging-profile-popup-events";
 import type { MediaBoxTools } from "$content/components/extension/MediaBoxTools";
-import { resolveTagCategoryFromTagName } from "$lib/philomena/tag-utils";
+import TagsListToggler, { BlackListedTagsEncounteredError } from "$content/components/extension/profiles/TagsListToggler";
+import { EVENT_TAG_TOGGLED } from "$content/components/events/tags-list-toggler-events";
 
-class BlackListedTagsEncounteredError extends Error {
-  constructor(tagName: string) {
-    super(`This tag is blacklisted and prevents submission: ${tagName}`, {
-      cause: tagName
-    });
-  }
-}
 
 export class TaggingProfilePopup extends BaseComponent {
-  #tagsListElement: HTMLElement = document.createElement('div');
-  #tagsList: HTMLElement[] = [];
-  #suggestedInvalidTags: Map<string, HTMLElement> = new Map();
+  #tagsListToggler = TagsListToggler.create();
   #activeProfile: TaggingProfile | null = null;
   #mediaBoxTools: MediaBoxTools | null = null;
-  #tagsToRemove: Set<string> = new Set();
-  #tagsToAdd: Set<string> = new Set();
+  #isSubmissionLocked: boolean = false;
   #isPlanningToSubmit: boolean = false;
   #isSubmitting: boolean = false;
   #tagsSubmissionTimer: Timeout | null = null;
@@ -41,11 +32,8 @@ export class TaggingProfilePopup extends BaseComponent {
     this.container.innerHTML = '';
     this.container.classList.add('maintenance-popup');
 
-    this.#tagsListElement.classList.add('tags-list');
-
-    this.container.append(
-      this.#tagsListElement,
-    );
+    this.#tagsListToggler.initialize();
+    this.container.append(this.#tagsListToggler.container);
   }
 
   /**
@@ -67,7 +55,7 @@ export class TaggingProfilePopup extends BaseComponent {
     this.#mediaBoxTools = mediaBoxTools;
 
     TaggingProfilePopup.#watchActiveProfile(this.#onActiveProfileChanged.bind(this));
-    this.#tagsListElement.addEventListener('click', this.#handleTagClick.bind(this));
+    on(this.#tagsListToggler, EVENT_TAG_TOGGLED, this.#onTagToggled.bind(this));
 
     const mediaBox = this.#mediaBoxTools.mediaBox;
 
@@ -75,108 +63,58 @@ export class TaggingProfilePopup extends BaseComponent {
       throw new Error('Media box component not found!');
     }
 
-    mediaBox.on('mouseout', this.#onMouseLeftArea.bind(this));
-    mediaBox.on('mouseover', this.#onMouseEnteredArea.bind(this));
+    mediaBox.on('mouseout', this.#maybeEnqueueSubmission.bind(this));
+    mediaBox.on('mouseover', this.#cancelQueuedSubmission.bind(this));
+  }
+
+  get tagsToggler() {
+    return this.#tagsListToggler;
+  }
+
+  get activeProfile() {
+    return this.#activeProfile;
+  }
+
+  toggleSubmissionLock(shouldLockSubmission: boolean) {
+    this.#isSubmissionLocked = shouldLockSubmission;
+
+    if (shouldLockSubmission) {
+      this.#cancelQueuedSubmission();
+      return;
+    }
+
+    // First notify that tags might have changed after submission lock was released and then enqueue it.
+    this.#onTagToggled();
+    this.#maybeEnqueueSubmission();
   }
 
   #onActiveProfileChanged(activeProfile: TaggingProfile | null) {
     this.#activeProfile = activeProfile;
     this.container.classList.toggle('is-active', activeProfile !== null);
-    this.#refreshTagsList();
+
+    this.#refreshTagsToggler();
 
     this.#emitter.emit(EVENT_ACTIVE_PROFILE_CHANGED, activeProfile);
   }
 
-  #refreshTagsList() {
+  #refreshTagsToggler() {
     if (!this.#mediaBoxTools?.mediaBox) {
       return;
     }
 
     const activeProfileTagsList: string[] = this.#activeProfile?.settings.tags || [];
+    const currentPostTags = new Set(this.#mediaBoxTools.mediaBox.tagsAndAliases?.keys() || []);
 
-    for (const tagElement of this.#tagsList) {
-      tagElement.remove();
-    }
-
-    for (const tagElement of this.#suggestedInvalidTags.values()) {
-      tagElement.remove();
-    }
-
-    this.#tagsList = new Array(activeProfileTagsList.length);
-    this.#suggestedInvalidTags.clear();
-
-    const currentPostTags = this.#mediaBoxTools.mediaBox.tagsAndAliases;
-
-    activeProfileTagsList
-      .sort((a, b) => a.localeCompare(b))
-      .forEach((tagName, index) => {
-        const tagElement = TaggingProfilePopup.#buildTagElement(tagName);
-        this.#tagsList[index] = tagElement;
-        this.#tagsListElement.appendChild(tagElement);
-
-        const isPresent = currentPostTags?.has(tagName);
-
-        tagElement.classList.toggle('is-present', isPresent);
-        tagElement.classList.toggle('is-missing', !isPresent);
-        tagElement.classList.toggle('is-aliased', isPresent && currentPostTags?.get(tagName) !== tagName);
-
-        // Just to prevent duplication, we need to include this tag to the map of suggested invalid tags
-        if (tagsBlacklist.includes(tagName)) {
-          TaggingProfilePopup.#markTagElementWithCategory(tagElement, 'error');
-          this.#suggestedInvalidTags.set(tagName, tagElement);
-        } else {
-          TaggingProfilePopup.#markTagElementWithCategory(
-            tagElement,
-            resolveTagCategoryFromTagName(tagName) ?? '',
-          );
-        }
-      });
+    this.#tagsListToggler.replaceTags(activeProfileTagsList, currentPostTags);
   }
 
   /**
    * Detect and process clicks made directly to the tags.
    */
-  #handleTagClick(event: MouseEvent) {
-    const targetObject = event.target;
+  #onTagToggled() {
+    const hasPendingChanges = this.#tagsListToggler.hasChanges;
 
-
-    if (!targetObject || !(targetObject instanceof HTMLElement)) {
-      return;
-    }
-
-    let tagElement: HTMLElement | null = targetObject;
-
-    if (!tagElement.classList.contains('tag')) {
-      tagElement = tagElement.closest<HTMLElement>('.tag');
-    }
-
-    if (!tagElement?.dataset.name) {
-      return;
-    }
-
-    const tagName = tagElement.dataset.name;
-
-    if (tagElement.classList.contains('is-present')) {
-      const isToBeRemoved = tagElement.classList.toggle('is-removed');
-
-      if (isToBeRemoved) {
-        this.#tagsToRemove.add(tagName);
-      } else {
-        this.#tagsToRemove.delete(tagName);
-      }
-    }
-
-    if (tagElement.classList.contains('is-missing')) {
-      const isToBeAdded = tagElement.classList.toggle('is-added');
-
-      if (isToBeAdded) {
-        this.#tagsToAdd.add(tagName);
-      } else {
-        this.#tagsToAdd.delete(tagName);
-      }
-    }
-
-    if (this.#tagsToAdd.size || this.#tagsToRemove.size) {
+    if (hasPendingChanges) {
       // Notify only once, when first planning to submit
       if (!this.#isPlanningToSubmit) {
         TaggingProfilePopup.#notifyAboutPendingSubmission(true);
@@ -188,7 +126,7 @@ export class TaggingProfilePopup extends BaseComponent {
 
     // Whenever user undoes the change they wanted to do in the popup, it's better to not send the submission and just
     // do nothing.
-    if (!this.#tagsToAdd.size && !this.#tagsToRemove.size && this.#isPlanningToSubmit) {
+    if (!hasPendingChanges && this.#isPlanningToSubmit) {
       this.#isPlanningToSubmit = false;
       this.#emitter.emit(EVENT_PROFILE_POPUP_STATE_CHANGED, 'ready');
       TaggingProfilePopup.#notifyAboutPendingSubmission(false);
@@ -200,14 +138,14 @@ export class TaggingProfilePopup extends BaseComponent {
     }
   }
 
-  #onMouseEnteredArea() {
+  #cancelQueuedSubmission() {
     if (this.#tagsSubmissionTimer) {
       clearTimeout(this.#tagsSubmissionTimer);
     }
   }
 
-  #onMouseLeftArea() {
-    if (this.#isPlanningToSubmit && !this.#isSubmitting) {
+  #maybeEnqueueSubmission() {
+    if (this.#isPlanningToSubmit && !this.#isSubmitting && !this.#isSubmissionLocked) {
       this.#tagsSubmissionTimer = setTimeout(
         this.#onSubmissionTimerPassed.bind(this),
         TaggingProfilePopup.#delayBeforeSubmissionMs
@@ -216,7 +154,7 @@ export class TaggingProfilePopup extends BaseComponent {
   }
 
   async #onSubmissionTimerPassed() {
-    if (!this.#isPlanningToSubmit || this.#isSubmitting || !this.#mediaBoxTools?.mediaBox) {
+    if (!this.#isPlanningToSubmit || this.#isSubmitting || !this.#mediaBoxTools?.mediaBox || this.#isSubmissionLocked) {
       return;
     }
 
@@ -232,29 +170,7 @@ export class TaggingProfilePopup extends BaseComponent {
     try {
       maybeTagsAndAliasesAfterUpdate = await TaggingProfilePopup.#scrapedAPI.updateImageTags(
         this.#mediaBoxTools.mediaBox.imageId,
-        tagsList => {
-          for (let tagName of this.#tagsToRemove) {
-            tagsList.delete(tagName);
-          }
-
-          for (let tagName of this.#tagsToAdd) {
-            tagsList.add(tagName);
-          }
-
-          if (shouldAutoRemove) {
-            for (let tagName of tagsBlacklist) {
-              tagsList.delete(tagName);
-            }
-          } else {
-            for (let tagName of tagsList) {
-              if (tagsBlacklist.includes(tagName)) {
-                throw new BlackListedTagsEncounteredError(tagName);
-              }
-            }
-          }
-
-          return tagsList;
-        }
+        this.#tagsListToggler.createTagsUpdater(shouldAutoRemove),
       );
     } catch (e) {
       if (e instanceof BlackListedTagsEncounteredError) {
@@ -277,10 +193,8 @@ export class TaggingProfilePopup extends BaseComponent {
 
     this.#emitter.emit(EVENT_PROFILE_POPUP_STATE_CHANGED, 'complete');
 
-    this.#tagsToAdd.clear();
-    this.#tagsToRemove.clear();
-
-    this.#refreshTagsList();
+    this.#tagsListToggler.clearChangeSet();
+    this.#refreshTagsToggler();
     TaggingProfilePopup.#notifyAboutPendingSubmission(false);
 
     this.#isSubmitting = false;
@@ -291,37 +205,13 @@ export class TaggingProfilePopup extends BaseComponent {
       return;
     }
 
-    const tagsAndAliases = this.#mediaBoxTools.mediaBox.tagsAndAliases;
+    const activeTags = new Set(this.#mediaBoxTools.mediaBox.tagsAndAliases?.keys() || []);
 
-    if (!tagsAndAliases) {
+    if (!activeTags.size) {
       return;
     }
 
-    const firstTagInList = this.#tagsList[0];
-
-    for (let tagName of tagsBlacklist) {
-      if (tagsAndAliases.has(tagName)) {
-        if (this.#suggestedInvalidTags.has(tagName)) {
-          continue;
-        }
-
-        const tagElement = TaggingProfilePopup.#buildTagElement(tagName);
-        TaggingProfilePopup.#markTagElementWithCategory(tagElement, 'error');
-        tagElement.classList.add('is-present');
-
-        this.#suggestedInvalidTags.set(tagName, tagElement);
-
-        if (firstTagInList && firstTagInList.isConnected) {
-          this.#tagsListElement.insertBefore(tagElement, firstTagInList);
-        } else {
-          this.#tagsListElement.appendChild(tagElement);
-        }
-      }
-    }
-  }
-
-  get isActive() {
-    return this.container.classList.contains('is-active');
+    this.#tagsListToggler.prependTags(tagsBlacklist, activeTags);
   }
 
   static create(): HTMLElement {
@@ -332,24 +222,6 @@ export class TaggingProfilePopup extends BaseComponent {
     return container;
   }
 
-  static #buildTagElement(tagName: string): HTMLElement {
-    const tagElement = document.createElement('span');
-    tagElement.classList.add('tag');
-    tagElement.innerText = tagName;
-    tagElement.dataset.name = tagName;
-
-    return tagElement;
-  }
-
-  /**
-   * Mark the tag element with specified category.
-   * @param tagElement Element to mark.
-   * @param category Code name of category to mark.
-   */
-  static #markTagElementWithCategory(tagElement: HTMLElement, category: string) {
-    tagElement.dataset.tagCategory = category;
-    tagElement.setAttribute('data-tag-category', category);
-  }
 
   /**
    * Controller with maintenance settings.
@@ -433,5 +305,5 @@ export class TaggingProfilePopup extends BaseComponent {
   /**
    * Amount of pending submissions or NULL if logic was not yet initialized.
    */
-  static #pendingSubmissionCount: number|null = null;
+  static #pendingSubmissionCount: number | null = null;
 }
diff --git a/src/content/components/extension/profiles/TagsListToggler.ts b/src/content/components/extension/profiles/TagsListToggler.ts
new file mode 100644
index 0000000..f70d727
--- /dev/null
+++ b/src/content/components/extension/profiles/TagsListToggler.ts
@@ -0,0 +1,230 @@
+import { BaseComponent } from "$content/components/base/BaseComponent";
+import { CategoriesEnum, tagsBlacklist } from "$config/tags";
+import { resolveTagCategoryFromTagName } from "$lib/philomena/tag-utils";
+import { EVENT_TAG_TOGGLED } from "$content/components/events/tags-list-toggler-events";
+import { emit } from "$content/components/events/comms";
+import type { TagsUpdaterFunction } from "$lib/philomena/scraping/ScrapedAPI";
+
+export default class TagsListToggler extends BaseComponent {
+  #tagsList: HTMLElement[] = [];
+  #invalidTagsList: Map<string, HTMLElement> = new Map();
+  #tagsToAdd: Set<string> = new Set();
+  #tagsToRemove: Set<string> = new Set();
+
+  protected build() {
+    this.container.classList.add('tags-list');
+  }
+
+  protected init() {
+    this.container.addEventListener('click', this.#handleTagClick.bind(this));
+  }
+
+  get hasChanges(): boolean {
+    return (this.#tagsToAdd.size + this.#tagsToRemove.size) > 0;
+  }
+
+  replaceTags(tags: string[], activeTags: Set<string>) {
+    for (const tagElement of this.#tagsList) {
+      tagElement.remove();
+    }
+
+    for (const tagElement of this.#invalidTagsList.values()) {
+      tagElement.remove();
+    }
+
+    this.#tagsList = [];
+    this.#invalidTagsList = new Map();
+
+    this.#renderAndInsertTags(tags, activeTags);
+  }
+
+  prependTags(tags: string[], activeTags: Set<string>) {
+    this.#renderAndInsertTags(tags, activeTags, true);
+  }
+
+  refreshStateFromChanges() {
+    for (const tagElement of this.#tagsList) {
+      const tagName = tagElement.dataset.name;
+
+      if (!tagName) {
+        throw new Error('Missing tag name!');
+      }
+
+      tagElement.classList.toggle(TagsListToggler.#addedClass, this.#tagsToAdd.has(tagName));
+      tagElement.classList.toggle(TagsListToggler.#removedClass, this.#tagsToRemove.has(tagName));
+    }
+  }
+
+  #renderAndInsertTags(toggleableTags: string[], activeTags: Set<string>, shouldPrepend: boolean = false) {
+    toggleableTags.sort((a, b) => a.localeCompare(b));
+
+    let lastInserted: HTMLElement|null = null;
+
+    const hasStoredChanges = this.hasChanges;
+
+    for (let tagIndex = 0; tagIndex < toggleableTags.length; tagIndex++) {
+      const tagName = toggleableTags[tagIndex];
+      const tagElement = TagsListToggler.#buildTagElement(tagName);
+
+      this.#tagsList.push(tagElement);
+
+      const isPresent = activeTags.has(tagName);
+
+      tagElement.classList.toggle(TagsListToggler.#missingClass, !isPresent);
+      tagElement.classList.toggle(TagsListToggler.#containsClass, isPresent);
+
+      if (hasStoredChanges) {
+        tagElement.classList.toggle(TagsListToggler.#addedClass, !isPresent && this.#tagsToAdd.has(tagName));
+        tagElement.classList.toggle(TagsListToggler.#removedClass, isPresent && this.#tagsToRemove.has(tagName));
+      }
+
+      const tagCategory = tagsBlacklist.includes(tagName) && CategoriesEnum.Error
+        || resolveTagCategoryFromTagName(tagName)
+        || '';
+
+      TagsListToggler.#markTagElementWithCategory(tagElement, tagCategory);
+
+      if (tagCategory === CategoriesEnum.Error) {
+        this.#invalidTagsList.set(tagName, tagElement);
+      }
+
+      if (shouldPrepend) {
+        if (lastInserted) {
+          lastInserted.after(tagElement);
+        } else {
+          this.container.prepend(tagElement);
+        }
+
+        lastInserted = tagElement;
+      } else {
+        this.container.append(tagElement);
+      }
+    }
+  }
+
+  createTagsUpdater(shouldAutoRemoveInvalid: boolean): TagsUpdaterFunction {
+    return tagsList => {
+      for (let tagName of this.#tagsToRemove) {
+        tagsList.delete(tagName);
+      }
+
+      for (let tagName of this.#tagsToAdd) {
+        tagsList.add(tagName);
+      }
+
+      if (shouldAutoRemoveInvalid) {
+        for (let tagName of tagsBlacklist) {
+          tagsList.delete(tagName);
+        }
+      } else {
+        for (let tagName of tagsList) {
+          if (tagsBlacklist.includes(tagName)) {
+            throw new BlackListedTagsEncounteredError(tagName);
+          }
+        }
+      }
+
+      return tagsList;
+    }
+  }
+
+  connectChangeSet(secondaryToggler: TagsListToggler) {
+    secondaryToggler.#tagsToAdd = this.#tagsToAdd;
+    secondaryToggler.#tagsToRemove = this.#tagsToRemove;
+  }
+
+  disconnectChangeSet() {
+    this.#tagsToAdd = new Set(this.#tagsToAdd.values());
+    this.#tagsToRemove = new Set(this.#tagsToRemove.values());
+  }
+
+  clearChangeSet() {
+    this.#tagsToAdd.clear();
+    this.#tagsToRemove.clear();
+  }
+
+  #handleTagClick(event: MouseEvent) {
+    const targetObject = event.target;
+
+
+    if (!targetObject || !(targetObject instanceof HTMLElement)) {
+      return;
+    }
+
+    let tagElement: HTMLElement | null = targetObject;
+
+    if (!tagElement.classList.contains('tag')) {
+      tagElement = tagElement.closest<HTMLElement>('.tag');
+    }
+
+    if (!tagElement?.dataset.name) {
+      return;
+    }
+
+    const tagName = tagElement.dataset.name;
+
+    let willBeActive = false;
+
+    if (tagElement.classList.contains(TagsListToggler.#containsClass)) {
+      const isToBeRemoved = tagElement.classList.toggle(TagsListToggler.#removedClass);
+      willBeActive = !isToBeRemoved;
+
+      if (isToBeRemoved) {
+        this.#tagsToRemove.add(tagName);
+      } else {
+        this.#tagsToRemove.delete(tagName);
+      }
+    }
+
+    if (tagElement.classList.contains(TagsListToggler.#missingClass)) {
+      const isToBeAdded = tagElement.classList.toggle(TagsListToggler.#addedClass);
+      willBeActive = isToBeAdded;
+
+      if (isToBeAdded) {
+        this.#tagsToAdd.add(tagName);
+      } else {
+        this.#tagsToAdd.delete(tagName);
+      }
+    }
+
+    emit(this.container, EVENT_TAG_TOGGLED, [tagName, willBeActive]);
+  }
+
+  static #buildTagElement(tagName: string): HTMLElement {
+    const tagElement = document.createElement('span');
+    tagElement.classList.add('tag');
+    tagElement.innerText = tagName;
+    tagElement.dataset.name = tagName;
+
+    return tagElement;
+  }
+
+  /**
+   * Mark the tag element with specified category.
+   * @param tagElement Element to mark.
+   * @param category Code name of category to mark.
+   */
+  static #markTagElementWithCategory(tagElement: HTMLElement, category: string) {
+    tagElement.dataset.tagCategory = category;
+    tagElement.setAttribute('data-tag-category', category);
+  }
+
+  static create(): TagsListToggler {
+    const tagsListContainer = document.createElement('div');
+    return new TagsListToggler(tagsListContainer);
+  }
+
+  static #containsClass = 'is-present';
+  static #missingClass = 'is-missing';
+
+  static #addedClass = 'is-added';
+  static #removedClass = 'is-removed';
+}
+
+export class BlackListedTagsEncounteredError extends Error {
+  constructor(tagName: string) {
+    super(`This tag is blacklisted and prevents submission: ${tagName}`, {
+      cause: tagName
+    });
+  }
+}
diff --git a/src/content/components/philomena/ImageContainer.ts b/src/content/components/philomena/ImageContainer.ts
new file mode 100644
index 0000000..10430a5
--- /dev/null
+++ b/src/content/components/philomena/ImageContainer.ts
@@ -0,0 +1,40 @@
+import { BaseComponent } from "$content/components/base/BaseComponent";
+
+export default class ImageContainer extends BaseComponent {
+  #imageLink: HTMLAnchorElement | null = null;
+
+  protected init() {
+    this.#imageLink = this.container.querySelector('a');
+  }
+
+  extractActualTags(): string[] {
+    return this.#imageLink?.title.split(' | Tagged: ')[1]?.split(', ') || [];
+  }
+
+  extractTagsAndAliases(): string[] {
+    return this.container.dataset.imageTagAliases?.split(', ') || [];
+  }
+
+  extractImageLinks(): App.ImageURIs {
+    const jsonUris = this.container?.dataset.uris;
+
+    if (!jsonUris) {
+      throw new Error('Missing URIs!');
+    }
+
+    return JSON.parse(jsonUris);
+  }
+
+  extractSources(): string[] {
+    const jsonSourceUrls = this.container.dataset.sourceUrls;
+    let sourceUrls: string[] | null = null;
+
+    try {
+      sourceUrls = JSON.parse(jsonSourceUrls || '[]');
+    } catch (e) {
+      console.warn('Failed to parse source URLs for the image!', this, e);
+    }
+
+    return sourceUrls || [];
+  }
+}
diff --git a/src/content/components/philomena/MediaBox.ts b/src/content/components/philomena/MediaBox.ts
index c7b1cc6..9c1f62e 100644
--- a/src/content/components/philomena/MediaBox.ts
+++ b/src/content/components/philomena/MediaBox.ts
@@ -3,15 +3,22 @@ import { getComponent } from "$content/components/base/component-utils";
 import { buildTagsAndAliasesMap } from "$lib/philomena/tag-utils";
 import { on } from "$content/components/events/comms";
 import { EVENT_TAGS_UPDATED } from "$content/components/events/tagging-profile-popup-events";
+import ImageContainer from "$content/components/philomena/ImageContainer";
+import type { MediaBoxTools } from "$content/components/extension/MediaBoxTools";
 
 export class MediaBox extends BaseComponent {
-  #thumbnailContainer: HTMLElement | null = null;
-  #imageLinkElement: HTMLAnchorElement | null = null;
+  #imageContainer: ImageContainer | null = null;
   #tagsAndAliases: Map<string, string> | null = null;
+  #mediaBoxTools: MediaBoxTools | null = null;
 
   init() {
-    this.#thumbnailContainer = this.container.querySelector('.image-container');
-    this.#imageLinkElement = this.#thumbnailContainer?.querySelector('a') || null;
+    const imageContainerElement = this.container.querySelector('.image-container');
+
+    this.#imageContainer = imageContainerElement instanceof HTMLElement
+      ? new ImageContainer(imageContainerElement)
+      : null;
+
+    this.#imageContainer?.initialize();
 
     on(this, EVENT_TAGS_UPDATED, this.#onTagsUpdatedRefreshTagsAndAliases.bind(this));
   }
@@ -27,12 +34,22 @@ export class MediaBox extends BaseComponent {
   }
 
   #calculateMediaBoxTags() {
-    const tagAliases: string[] = this.#thumbnailContainer?.dataset.imageTagAliases?.split(', ') || [];
-    const actualTags = this.#imageLinkElement?.title.split(' | Tagged: ')[1]?.split(', ') || [];
+    const tagAliases = this.#imageContainer?.extractTagsAndAliases() || [];
+    const actualTags = this.#imageContainer?.extractActualTags() || [];
 
     return buildTagsAndAliasesMap(tagAliases, actualTags);
   }
 
+  get uniqueTagsSet(): Set<string> | null {
+    const tagsAndAliases = this.tagsAndAliases;
+
+    if (tagsAndAliases === null) {
+      return null;
+    }
+
+    return new Set(tagsAndAliases.values());
+  }
+
   get tagsAndAliases(): Map<string, string> | null {
     if (!this.#tagsAndAliases) {
       this.#tagsAndAliases = this.#calculateMediaBoxTags();
@@ -52,26 +69,31 @@ export class MediaBox extends BaseComponent {
   }
 
   get imageLinks(): App.ImageURIs {
-    const jsonUris = this.#thumbnailContainer?.dataset.uris;
+    const sourceUrls = this.#imageContainer?.extractImageLinks();
 
-    if (!jsonUris) {
-      throw new Error('Missing URIs!');
+    if (!sourceUrls) {
+      throw new Error('Missing image container!');
     }
 
-    return JSON.parse(jsonUris);
+    return sourceUrls;
+  }
+
+  get tools(): MediaBoxTools | null {
+    return this.#mediaBoxTools;
   }
 
   /**
    * Wrap the media box element into the special wrapper.
    */
-  static initialize(mediaBoxContainer: HTMLElement, childComponentElements: HTMLElement[]) {
-    new MediaBox(mediaBoxContainer)
-      .initialize();
+  static initialize(mediaBoxContainer: HTMLElement, mediaBoxToolsElement: HTMLElement) {
+    const mediaBox = new MediaBox(mediaBoxContainer);
+    mediaBox.initialize();
 
-    for (let childComponentElement of childComponentElements) {
-      mediaBoxContainer.appendChild(childComponentElement);
-      getComponent(childComponentElement)?.initialize();
-    }
+    mediaBoxContainer.appendChild(mediaBoxToolsElement);
+    const mediaBoxToolsComponent = getComponent<MediaBoxTools>(mediaBoxToolsElement);
+    mediaBoxToolsComponent?.initialize();
+
+    mediaBox.#mediaBoxTools = mediaBoxToolsComponent;
   }
 
   static findElements(): NodeListOf<HTMLElement> {
diff --git a/src/content/components/philomena/dupe/DupeDiff.ts b/src/content/components/philomena/dupe/DupeDiff.ts
new file mode 100644
index 0000000..c4f73d9
--- /dev/null
+++ b/src/content/components/philomena/dupe/DupeDiff.ts
@@ -0,0 +1,232 @@
+import { BaseComponent } from "$content/components/base/BaseComponent";
+import { createFontAwesomeIcon } from "$lib/dom-utils";
+
+const brandsSubtype = 'brands';
+
+export default class DupeDiff extends BaseComponent {
+  #sourcesLine: HTMLElement | null = null;
+  #ratingsLine: HTMLElement | null = null;
+
+  protected init() {
+    const {
+      "6": sourcesLine,
+      "7": ratingsLine,
+    } = this.container.querySelectorAll<HTMLElement>('table tr > td')
+
+    this.#sourcesLine = sourcesLine;
+    this.#ratingsLine = ratingsLine;
+  }
+
+  renderSources(leftSources: string[], rightSources: string[]): void {
+    if (!this.#sourcesLine) {
+      console.error("Can't render sources since no sources line in diff fonud!");
+      return;
+    }
+
+    for (const childElement of this.#sourcesLine.children) {
+      childElement.remove();
+    }
+
+    const sourceIconsContainer = document.createElement('span');
+    sourceIconsContainer.classList.add('source-icons');
+
+    sourceIconsContainer.append(
+      this.#renderSourceIcons(leftSources),
+      " vs ",
+      this.#renderSourceIcons(rightSources),
+    );
+
+    this.#sourcesLine.append(sourceIconsContainer);
+  }
+
+  renderRatings(leftRating: string | null, rightRating: string | null) {
+    if (!this.#ratingsLine) {
+      return;
+    }
+
+    for (const childElement of this.#ratingsLine.children) {
+      childElement.remove();
+    }
+
+    if (leftRating === rightRating) {
+      return;
+    }
+
+    const ratingDifference = document.createElement('span');
+    ratingDifference.classList.add('ratings-difference');
+    ratingDifference.textContent = `(${leftRating || '(none)'} vs ${rightRating || '(none)'})`;
+
+    this.#ratingsLine.append(ratingDifference);
+  }
+
+  #renderSourceIcons(sourcesList: string[]): HTMLElement {
+    const iconsContainer = document.createElement('span');
+    iconsContainer.classList.add('source-icons__list');
+
+    for (const sourceUrl of sourcesList) {
+      iconsContainer.append(this.#renderIcon(sourceUrl));
+    }
+
+    if (!sourcesList.length) {
+      iconsContainer.append('(none)');
+    }
+
+    return iconsContainer;
+  }
+
+  #renderIcon(url: string): HTMLElement {
+    let iconSlug = 'globe';
+    let maybeSubtype: string | undefined;
+
+    for (const [iconOrIconWithSubtype, singleOrMultiPattern] of DupeDiff.#iconsToPatternsMap) {
+      if (
+        typeof singleOrMultiPattern === 'string' && url.includes(singleOrMultiPattern)
+        || Array.isArray(singleOrMultiPattern) && singleOrMultiPattern.some(singlePattern => url.includes(singlePattern))
+      ) {
+        if (Array.isArray(iconOrIconWithSubtype)) {
+          [iconSlug, maybeSubtype] = iconOrIconWithSubtype;
+        } else {
+          iconSlug = iconOrIconWithSubtype;
+        }
+        break;
+      }
+    }
+
+    const sourceIcon = createFontAwesomeIcon(iconSlug, maybeSubtype);
+    sourceIcon.title = url;
+
+    return sourceIcon;
+  }
+
+  /**
+   * Mirroring of mapping from source URL domains to appropriate FontAwesome icons which is used in Philomena. Doesn't
+   * match 1-to-1, but pretty close.
+   *
+   * Keys are the icons and values are the patterns extension should check for each URL.
+   */
+  static #iconsToPatternsMap = new Map<string[] | string, string[] | string>([
+    [
+      ['artstation', brandsSubtype],
+      'artstation.com'
+    ],
+    [
+      'bed',
+      'pillowfort.social',
+    ],
+    [
+      'bolt-lightning',
+      'boosty.to',
+    ],
+    [
+      ['bluesky', brandsSubtype],
+      'bsky.app',
+    ],
+    [
+      'brush',
+      ['artfight.net', 'newgrounds.com'],
+    ],
+    [
+      'coffee',
+      ['ko-fi.com', 'buymeacoffee.com'],
+    ],
+    [
+      ['deviantart', brandsSubtype],
+      ['deviantart.com', 'sta.sh', 'fav.me'],
+    ],
+    [
+      ['discord', brandsSubtype],
+      ['discordapp.com', 'discord.com', 'discord.gg'],
+    ],
+    [
+      'dove',
+      'itaku.ee',
+    ],
+    [
+      ['etsy', brandsSubtype],
+      'etsy.com',
+    ],
+    [
+      ['facebook', brandsSubtype],
+      ['facebook.com', 'fb.me'],
+    ],
+    [
+      ['flickr', brandsSubtype],
+      'flickr.com',
+    ],
+    [
+      ['instagram', brandsSubtype],
+      'instagram.com',
+    ],
+    [
+      ['mastodon', brandsSubtype],
+      [
+        'awoo.space',
+        'bark.light',
+        'equestria.social',
+        'mastodon.social',
+        'meow.social',
+        'pawoo.net',
+        'pettingzoo.co',
+        'pony.social',
+        'vulpine.club',
+        'yiff.life',
+        'socel.net',
+        'octodon.social',
+        'filly.social',
+        'pone.social',
+        'hooves.social',
+        'baraag.net',
+        'furries.club',
+      ],
+    ],
+    [
+      'palette',
+      ['ych.art', 'commishes.com']
+    ],
+    [
+      ['patreon', brandsSubtype],
+      'patreon.com'
+    ],
+    [
+      'paw',
+      ['furaffinity.net', 'e621.net', 'furbooru.org', 'inkbunny.net', 'e926.net', 'sofurry.com', 'weasyl.co'],
+    ],
+    [
+      ['pixiv', brandsSubtype],
+      ['pixiv.net', 'pixiv.me'],
+    ],
+    [
+      ['reddit', brandsSubtype],
+      ['reddit.com', 'redd.it'],
+    ],
+    // Patreon piracy website, applying custom icon to easily catch such posts.
+    [
+      'skull-crossbones',
+      'kemono.cr',
+    ],
+    [
+      ['telegram', brandsSubtype],
+      't.me',
+    ],
+    [
+      ['tiktok', brandsSubtype],
+      'tiktok.com'
+    ],
+    [
+      ['tumblr', brandsSubtype],
+      ['tumblr.com', 'tmblr.co', 'tumbex.com'],
+    ],
+    [
+      ['vk', brandsSubtype],
+      ['vk.com', 'vk.ru'],
+    ],
+    [
+      ['x-twitter', brandsSubtype],
+      ['x.com', 'twitter.com', 'twimg.com']
+    ],
+    [
+      ['youtube', brandsSubtype],
+      ['youtube.com', 'youtu.be'],
+    ],
+  ]);
+}
diff --git a/src/content/components/philomena/dupe/DupeImage.ts b/src/content/components/philomena/dupe/DupeImage.ts
new file mode 100644
index 0000000..b6f93d7
--- /dev/null
+++ b/src/content/components/philomena/dupe/DupeImage.ts
@@ -0,0 +1,19 @@
+import { BaseComponent } from "$content/components/base/BaseComponent";
+import ImageContainer from "$content/components/philomena/ImageContainer";
+
+export default class DupeImage extends BaseComponent {
+  readonly imageContainer: ImageContainer;
+
+  constructor(container: HTMLElement) {
+    super(container);
+
+    const imageContainerElement = container.querySelector<HTMLElement>('.image-container');
+
+    if (!imageContainerElement) {
+      throw new Error('Missing image container inside the dupe row!');
+    }
+
+    this.imageContainer = new ImageContainer(imageContainerElement);
+    this.imageContainer.initialize();
+  }
+}
diff --git a/src/content/components/philomena/dupe/DupeReportRow.ts b/src/content/components/philomena/dupe/DupeReportRow.ts
new file mode 100644
index 0000000..5b9ab9f
--- /dev/null
+++ b/src/content/components/philomena/dupe/DupeReportRow.ts
@@ -0,0 +1,47 @@
+import { BaseComponent } from "$content/components/base/BaseComponent";
+import DupeDiff from "$content/components/philomena/dupe/DupeDiff";
+import DupeImage from "$content/components/philomena/dupe/DupeImage";
+import { ratingTags } from "$config/tags";
+
+export default class DupeReportRow extends BaseComponent {
+  #leftImage: DupeImage;
+  #rightImage: DupeImage;
+  #difference: DupeDiff;
+
+  constructor(leftCell: HTMLElement, rightCell: HTMLElement, diffCell: HTMLElement, reportOptions: HTMLElement) {
+    super(reportOptions);
+
+    this.#leftImage = new DupeImage(leftCell);
+    this.#rightImage = new DupeImage(rightCell);
+    this.#difference = new DupeDiff(diffCell);
+  }
+
+  protected build() {
+    this.#leftImage.initialize();
+    this.#rightImage.initialize();
+    this.#difference.initialize();
+  }
+
+  protected init() {
+    this.#extractAndRenderSourcesIcons();
+    this.#extractAndDisplayRatings();
+  }
+
+  #extractAndRenderSourcesIcons() {
+    this.#difference.renderSources(
+      this.#leftImage.imageContainer.extractSources(),
+      this.#rightImage.imageContainer.extractSources(),
+    );
+  }
+
+  #extractAndDisplayRatings() {
+    this.#difference.renderRatings(
+      DupeReportRow.#extractRating(this.#leftImage),
+      DupeReportRow.#extractRating(this.#rightImage),
+    );
+  }
+
+  static #extractRating(image: DupeImage): string | null {
+    return image.imageContainer.extractActualTags().find(tagName => ratingTags.includes(tagName)) || null;
+  }
+}
diff --git a/src/content/components/philomena/dupe/GridDupeReportsList.ts b/src/content/components/philomena/dupe/GridDupeReportsList.ts
new file mode 100644
index 0000000..902f1d2
--- /dev/null
+++ b/src/content/components/philomena/dupe/GridDupeReportsList.ts
@@ -0,0 +1,43 @@
+import { BaseComponent } from "$content/components/base/BaseComponent";
+import DupeReportRow from "$content/components/philomena/dupe/DupeReportRow";
+
+export default class GridDupeReportsList extends BaseComponent {
+  readonly #reports: DupeReportRow[] = [];
+
+  protected build() {
+    const repotRowsList = this.container.querySelectorAll(':scope > tbody > tr');
+
+    for (const reportRow of repotRowsList) {
+      const startingCell = reportRow.firstElementChild;
+      const rightImageCell = startingCell?.nextElementSibling || null;
+      const diffCell = rightImageCell?.nextElementSibling || null;
+      const reportOptionsCell = diffCell?.nextElementSibling || null;
+
+      if (!(startingCell instanceof HTMLElement) || !(rightImageCell instanceof HTMLElement) || !(diffCell instanceof HTMLElement) || !(reportOptionsCell instanceof HTMLElement)) {
+        console.error(`Unable to capture duplicate report!`, reportRow);
+        continue;
+      }
+
+      this.#reports.push(
+        new DupeReportRow(
+          startingCell,
+          rightImageCell,
+          diffCell,
+          reportOptionsCell,
+        )
+      );
+    }
+  }
+
+  protected init() {
+    for (const report of this.#reports) {
+      report.initialize();
+    }
+  }
+
+  static findAndInitialize() {
+    for (const container of document.querySelectorAll<HTMLElement>('.dupe-report-list')) {
+      new GridDupeReportsList(container).initialize();
+    }
+  }
+}
diff --git a/src/content/duplicate-reports.ts b/src/content/duplicate-reports.ts
new file mode 100644
index 0000000..866a71b
--- /dev/null
+++ b/src/content/duplicate-reports.ts
@@ -0,0 +1,3 @@
+import GridDupeReportsList from "$content/components/philomena/dupe/GridDupeReportsList";
+
+GridDupeReportsList.findAndInitialize();
diff --git a/src/content/listing.ts b/src/content/listing.ts
index 21e240e..d91785e 100644
--- a/src/content/listing.ts
+++ b/src/content/listing.ts
@@ -8,13 +8,11 @@ import { ImageListContainer } from "$content/components/philomena/listing/ImageL
 const mediaBoxes = MediaBox.findElements();
 
 mediaBoxes.forEach(mediaBoxElement => {
-  MediaBox.initialize(mediaBoxElement, [
-    MediaBoxTools.create(
-      TaggingProfilePopup.create(),
-      TaggingProfileStatusIcon.create(),
-      ImageShowFullscreenButton.create(),
-    )
-  ]);
+  MediaBox.initialize(mediaBoxElement, MediaBoxTools.create(
+    TaggingProfilePopup.create(),
+    TaggingProfileStatusIcon.create(),
+    ImageShowFullscreenButton.create(),
+  ));
 
   // Attempt to fix misplacement of media boxes
   requestAnimationFrame(() => {
diff --git a/src/content/user-details.ts b/src/content/user-details.ts
new file mode 100644
index 0000000..6d1cfa1
--- /dev/null
+++ b/src/content/user-details.ts
@@ -0,0 +1,14 @@
+import { UserDetails } from "$lib/extension/preferences/UserDetails";
+
+(async () => {
+  const userDetails = new UserDetails();
+  const userDataStore = document.querySelector<HTMLElement>('.js-datastore');
+
+  if (!userDataStore) {
+    return;
+  }
+
+  await userDetails.isAuthorized.set(userDataStore.dataset.userIsSignedIn === 'true');
+})();
+
+
diff --git a/src/lib/dom-utils.ts b/src/lib/dom-utils.ts
index bfef56b..9b2164f 100644
--- a/src/lib/dom-utils.ts
+++ b/src/lib/dom-utils.ts
@@ -2,10 +2,11 @@
  * Reusable function to create icons from FontAwesome. Usable only for website, since extension doesn't host its own
  * copy of FA styles. Extension should use imports of SVGs inside CSS instead.
  * @param iconSlug Slug of the icon to be added.
+ * @param [subtype="solid"] Subtype of the icon. Some icons only exist in specific subtypes.
  * @return Element with classes for FontAwesome icon added.
  */
-export function createFontAwesomeIcon(iconSlug: string): HTMLElement {
+export function createFontAwesomeIcon(iconSlug: string, subtype: string = 'solid'): HTMLElement {
   const iconElement = document.createElement('i');
-  iconElement.classList.add('fa-solid', `fa-${iconSlug}`);
+  iconElement.classList.add(`fa-${subtype}`, `fa-${iconSlug}`);
   return iconElement;
 }
diff --git a/src/lib/extension/EntitiesController.ts b/src/lib/extension/EntitiesController.ts
index 8a680e5..0df9dc9 100644
--- a/src/lib/extension/EntitiesController.ts
+++ b/src/lib/extension/EntitiesController.ts
@@ -2,7 +2,15 @@ import StorageHelper, { type StorageChangeSubscriber } from "$lib/browser/Storag
 import type StorageEntity from "$lib/extension/base/StorageEntity";
 
 export default class EntitiesController {
-  static #storageHelper = new StorageHelper(chrome.storage.local);
+  /**
+   * Instance of storage helper used to store/read/subscribe to storage changes.
+   *
+   * Mainly exposed for the testing purposes. When class is loaded outside of extension context, will hold `null`
+   * instead. Any operations of entities will throw an error in this case.
+   */
+  static storage: StorageHelper | null = typeof chrome !== 'undefined'
+    ? new StorageHelper(chrome.storage.local)
+    : null;
 
   /**
    * Read all entities of the given type from the storage. Build the entities from the raw data and return them.
@@ -14,7 +22,11 @@ export default class EntitiesController {
    * @return List of entities of the given type.
    */
   static async readAllEntities<Type extends StorageEntity<any>>(entityName: string, entityClass: new (...any: any[]) => Type): Promise<Type[]> {
-    const rawEntities = await this.#storageHelper.read(entityName, {});
+    if (!this.storage) {
+      throw new Error('Missing storage!');
+    }
+
+    const rawEntities = await this.storage.read(entityName, {});
 
     if (!rawEntities || Object.keys(rawEntities).length === 0) {
       return [];
@@ -32,10 +44,14 @@ export default class EntitiesController {
    * @param entity Entity to update.
    */
   static async updateEntity(entityName: string, entity: StorageEntity<Object>): Promise<void> {
-    this.#storageHelper.write(
+    if (!this.storage) {
+      throw new Error('Missing storage!');
+    }
+
+    this.storage.write(
       entityName,
       Object.assign(
-        await this.#storageHelper.read(
+        await this.storage.read(
           entityName, {}
         ),
         {
@@ -52,9 +68,13 @@ export default class EntitiesController {
    * @param entityId ID of the entity to delete.
    */
   static async deleteEntity(entityName: string, entityId: string): Promise<void> {
-    const entities = await this.#storageHelper.read(entityName, {});
+    if (!this.storage) {
+      throw new Error('Missing storage!');
+    }
+
+    const entities = await this.storage.read(entityName, {});
     delete entities[entityId];
-    this.#storageHelper.write(entityName, entities);
+    this.storage.write(entityName, entities);
   }
 
   /**
@@ -68,6 +88,12 @@ export default class EntitiesController {
    * @return Unsubscribe function.
    */
   static subscribeToEntity<Type extends StorageEntity<any>>(entityName: string, entityClass: new (...any: any[]) => Type, callback: (entities: Type[]) => void): () => void {
+    if (!this.storage) {
+      throw new Error('Missing storage!');
+    }
+
+    const storage = this.storage;
+
     /**
      * Watch the changes made to the storage and call the callback when the entity changes.
      */
@@ -80,8 +106,8 @@ export default class EntitiesController {
         .then(callback);
     }
 
-    this.#storageHelper.subscribe(subscriber);
+    storage.subscribe(subscriber);
 
-    return () => this.#storageHelper.unsubscribe(subscriber);
+    return () => storage.unsubscribe(subscriber);
   }
 }
diff --git a/src/lib/extension/base/CacheablePreferences.ts b/src/lib/extension/base/CacheablePreferences.ts
index 2bcdbd2..f981763 100644
--- a/src/lib/extension/base/CacheablePreferences.ts
+++ b/src/lib/extension/base/CacheablePreferences.ts
@@ -70,6 +70,10 @@ export class PreferenceField<
   set(value: Fields[Key]) {
     return this.#preferences.writeRaw(this.#fieldKey, value);
   }
+
+  get key(): Key {
+    return this.#fieldKey;
+  }
 }
 
 /**
diff --git a/src/lib/extension/preferences/MiscPreferences.ts b/src/lib/extension/preferences/MiscPreferences.ts
index 0c14051..2482d9a 100644
--- a/src/lib/extension/preferences/MiscPreferences.ts
+++ b/src/lib/extension/preferences/MiscPreferences.ts
@@ -8,6 +8,7 @@ export type FullscreenViewerSize = keyof App.ImageURIs;
 interface MiscPreferencesFields {
   fullscreenViewer: boolean;
   fullscreenViewerSize: FullscreenViewerSize;
+  fullscreenViewerPopupShown: boolean;
 }
 
 export default class MiscPreferences extends CacheablePreferences<MiscPreferencesFields> implements WithFields<MiscPreferencesFields> {
@@ -24,4 +25,9 @@ export default class MiscPreferences extends CacheablePreferences<MiscPreference
     field: "fullscreenViewerSize",
     defaultValue: "large",
   });
+
+  readonly fullscreenViewerPopupShown = new PreferenceField(this, {
+    field: "fullscreenViewerPopupShown",
+    defaultValue: true,
+  });
 }
diff --git a/src/lib/extension/preferences/UserDetails.ts b/src/lib/extension/preferences/UserDetails.ts
new file mode 100644
index 0000000..f6c760f
--- /dev/null
+++ b/src/lib/extension/preferences/UserDetails.ts
@@ -0,0 +1,16 @@
+import CacheablePreferences, { PreferenceField, type WithFields } from "$lib/extension/base/CacheablePreferences";
+
+export interface UserDetailsFields {
+  isAuthorized: boolean;
+}
+
+export class UserDetails extends CacheablePreferences<UserDetailsFields> implements WithFields<UserDetailsFields> {
+  constructor() {
+    super('userDetails');
+  }
+
+  isAuthorized = new PreferenceField(this, {
+    field: 'isAuthorized',
+    defaultValue: false,
+  });
+}
diff --git a/src/lib/philomena/scraping/ScrapedAPI.ts b/src/lib/philomena/scraping/ScrapedAPI.ts
index 39cdf71..292b7ff 100644
--- a/src/lib/philomena/scraping/ScrapedAPI.ts
+++ b/src/lib/philomena/scraping/ScrapedAPI.ts
@@ -1,6 +1,6 @@
 import PostParser from "$lib/philomena/scraping/parsing/PostParser";
 
-type UpdaterFunction = (tags: Set<string>) => Set<string>;
+export type TagsUpdaterFunction = (tags: Set<string>) => Set<string>;
 
 export default class ScrapedAPI {
   /**
@@ -9,7 +9,7 @@ export default class ScrapedAPI {
    * @param callback Callback to call to change the content.
    * @return Updated tags and aliases list for updating internal cached state.
    */
-  async updateImageTags(imageId: number, callback: UpdaterFunction): Promise<Map<string, string> | null> {
+  async updateImageTags(imageId: number, callback: TagsUpdaterFunction): Promise<Map<string, string> | null> {
     const postParser = new PostParser(imageId);
     const formData = await postParser.resolveTagEditorFormData();
     const tagsFieldValue = formData.get(PostParser.tagsInputName);
diff --git a/src/lib/store-sync.ts b/src/lib/store-sync.ts
new file mode 100644
index 0000000..772d757
--- /dev/null
+++ b/src/lib/store-sync.ts
@@ -0,0 +1,65 @@
+import type { Writable } from "svelte/store";
+import CacheablePreferences, { type PreferenceField } from "$lib/extension/base/CacheablePreferences";
+
+interface PrerefenceConnectionOptions<ValueType> {
+  /**
+   * Optional callback to apply modifications to the value when sending them from the preference field to the single
+   * storage. If not provided, value itself will be sent instead.
+   */
+  updateToStore?: (value: any) => ValueType;
+}
+
+export class PreferenceSync<PreferencesType extends Record<string, any> = Record<string, any>> {
+  readonly #preferences: CacheablePreferences<PreferencesType>;
+  readonly #syncedPairs: [PreferenceField<PreferencesType, string>, Writable<any>, PrerefenceConnectionOptions<any>][] = [];
+
+  protected constructor(preferences: CacheablePreferences<PreferencesType>) {
+    this.#preferences = preferences;
+  }
+
+  /**
+   * Connect the specific preference field to the provided storage.
+   * @param field Field object.
+   * @param store Storage object. Should contain the appropriate type for the value.
+   * @param [options] Additional settings.
+   */
+  connect<FieldKey extends keyof PreferencesType>(
+    field: PreferenceField<PreferencesType, FieldKey>,
+    store: Writable<PreferencesType[FieldKey]>,
+    options: PrerefenceConnectionOptions<PreferencesType[FieldKey]> = {}
+  ): this {
+    this.#syncedPairs.push([field as any, store, options]);
+
+    return this;
+  }
+
+  async startSync(): Promise<void> {
+    await Promise.allSettled(
+      this.#syncedPairs.map(
+        ([field, store, options]) => field.get()
+          .then(initialValue => store.set(options.updateToStore?.(initialValue) ?? initialValue))
+      )
+    );
+
+    for (const [field, store] of this.#syncedPairs) {
+      store.subscribe(value => field.set(value));
+    }
+
+    this.#preferences.subscribe(updatedSettings => {
+      for (const [field, store, options] of this.#syncedPairs) {
+        if (!(field.key in updatedSettings)) {
+          continue;
+        }
+
+        const updatedValue = updatedSettings[field.key];
+        store.set(options.updateToStore?.(updatedValue) ?? updatedValue);
+      }
+    });
+  }
+
+  static for<
+    PreferencesType extends Record<string, any> = Record<string, any>
+  >(preferences: CacheablePreferences<PreferencesType>): PreferenceSync<PreferencesType> {
+    return new PreferenceSync<PreferencesType>(preferences);
+  }
+}
diff --git a/src/routes/features/profiles/+page.svelte b/src/routes/features/profiles/+page.svelte
index 5841977..e8d71c4 100644
--- a/src/routes/features/profiles/+page.svelte
+++ b/src/routes/features/profiles/+page.svelte
@@ -5,6 +5,8 @@
   import { activeTaggingProfile, taggingProfiles } from "$stores/entities/tagging-profiles";
   import TaggingProfile from "$entities/TaggingProfile";
   import { popupTitle } from "$stores/popup";
+  import { user } from "$stores/preferences/user";
+  import Notice from "$components/ui/Notice.svelte";
 
   $popupTitle = 'Tagging Profiles';
 
@@ -28,6 +30,18 @@
 <Menu>
   <MenuItem href="/" icon="arrow-left">Back</MenuItem>
   <MenuItem href="/features/profiles/new/edit" icon="plus">Create New</MenuItem>
+</Menu>
+{#if $user?.isAuthorized === false}
+  <Menu>
+    <hr>
+  </Menu>
+  <Notice level="warning">
+    <strong>Tagging profiles will only work when you're signed in!</strong>
+    <br><br>
+    Unauthorized users have to solve the captcha before sending any submissions to the site.
+  </Notice>
+{/if}
+<Menu>
   {#if profiles.length}
     <hr>
   {/if}
diff --git a/src/stores/preferences/misc.ts b/src/stores/preferences/misc.ts
index 121939a..8395462 100644
--- a/src/stores/preferences/misc.ts
+++ b/src/stores/preferences/misc.ts
@@ -1,18 +1,11 @@
 import { writable } from "svelte/store";
 import MiscPreferences from "$lib/extension/preferences/MiscPreferences";
+import { PreferenceSync } from "$lib/store-sync";
 
 export const fullScreenViewerEnabled = writable(true);
 
 const preferences = new MiscPreferences();
 
-Promise.allSettled([
-  preferences.fullscreenViewer.get().then(v => fullScreenViewerEnabled.set(v))
-]).then(() => {
-  fullScreenViewerEnabled.subscribe(value => {
-    void preferences.fullscreenViewer.set(value);
-  });
-
-  preferences.subscribe(settings => {
-    fullScreenViewerEnabled.set(Boolean(settings.fullscreenViewer));
-  });
-});
+void PreferenceSync.for(preferences)
+  .connect(preferences.fullscreenViewer, fullScreenViewerEnabled, {updateToStore: Boolean})
+  .startSync();
diff --git a/src/stores/preferences/profiles.ts b/src/stores/preferences/profiles.ts
index f7a65fc..55a056b 100644
--- a/src/stores/preferences/profiles.ts
+++ b/src/stores/preferences/profiles.ts
@@ -1,18 +1,13 @@
 import { writable } from "svelte/store";
 import TaggingProfilesPreferences from "$lib/extension/preferences/TaggingProfilesPreferences";
+import { PreferenceSync } from "$lib/store-sync";
 
 export const stripBlacklistedTagsEnabled = writable(true);
 
 const preferences = new TaggingProfilesPreferences();
 
-Promise
-  .all([
-    preferences.stripBlacklistedTags.get().then(v => stripBlacklistedTagsEnabled.set(v ?? true))
-  ])
-  .then(() => {
-    preferences.subscribe(settings => {
-      stripBlacklistedTagsEnabled.set(typeof settings.stripBlacklistedTags === 'boolean' ? settings.stripBlacklistedTags : true);
-    });
-
-    stripBlacklistedTagsEnabled.subscribe(v => preferences.stripBlacklistedTags.set(v));
-  });
+void PreferenceSync.for(preferences)
+  .connect(preferences.stripBlacklistedTags, stripBlacklistedTagsEnabled, {
+    updateToStore: maybeBoolean => typeof maybeBoolean === 'boolean' ? maybeBoolean : true,
+  })
+  .startSync();
diff --git a/src/stores/preferences/tags.ts b/src/stores/preferences/tags.ts
index 84b1239..3929f8a 100644
--- a/src/stores/preferences/tags.ts
+++ b/src/stores/preferences/tags.ts
@@ -1,5 +1,6 @@
 import { writable } from "svelte/store";
 import TagsPreferences from "$lib/extension/preferences/TagsPreferences";
+import { PreferenceSync } from "$lib/store-sync";
 
 const preferences = new TagsPreferences();
 
@@ -7,28 +8,8 @@ export const shouldSeparateTagGroups = writable(false);
 export const shouldReplaceLinksOnForumPosts = writable(false);
 export const shouldReplaceTextOfTagLinks = writable(true);
 
-Promise
-  .allSettled([
-    preferences.groupSeparation.get().then(value => shouldSeparateTagGroups.set(value)),
-    preferences.replaceLinks.get().then(value => shouldReplaceLinksOnForumPosts.set(value)),
-    preferences.replaceLinkText.get().then(value => shouldReplaceTextOfTagLinks.set(value)),
-  ])
-  .then(() => {
-    shouldSeparateTagGroups.subscribe(value => {
-      void preferences.groupSeparation.set(value);
-    });
-
-    shouldReplaceLinksOnForumPosts.subscribe(value => {
-      void preferences.replaceLinks.set(value);
-    });
-
-    shouldReplaceTextOfTagLinks.subscribe(value => {
-      void preferences.replaceLinkText.set(value);
-    });
-
-    preferences.subscribe(settings => {
-      shouldSeparateTagGroups.set(Boolean(settings.groupSeparation));
-      shouldReplaceLinksOnForumPosts.set(Boolean(settings.replaceLinks));
-      shouldReplaceTextOfTagLinks.set(Boolean(settings.replaceLinkText));
-    });
-  });
+void PreferenceSync.for(preferences)
+  .connect(preferences.groupSeparation, shouldSeparateTagGroups, {updateToStore: Boolean})
+  .connect(preferences.replaceLinks, shouldReplaceLinksOnForumPosts, {updateToStore: Boolean})
+  .connect(preferences.replaceLinkText, shouldReplaceTextOfTagLinks, {updateToStore: Boolean})
+  .startSync();
diff --git a/src/stores/preferences/user.ts b/src/stores/preferences/user.ts
new file mode 100644
index 0000000..2c968e6
--- /dev/null
+++ b/src/stores/preferences/user.ts
@@ -0,0 +1,18 @@
+import { UserDetails, type UserDetailsFields } from "$lib/extension/preferences/UserDetails";
+import { readable } from "svelte/store";
+
+const userDetails = new UserDetails();
+
+export const user = readable<UserDetailsFields | null>(null, set => {
+  userDetails.subscribe(settings => {
+    set({
+      isAuthorized: Boolean(settings.isAuthorized)
+    });
+  });
+
+  userDetails.isAuthorized.get().then(isAuthorized => {
+    set({
+      isAuthorized
+    });
+  });
+});
diff --git a/src/styles/booru-vars.scss b/src/styles/booru-vars.scss
index 1f9d5f6..1819a9e 100644
--- a/src/styles/booru-vars.scss
+++ b/src/styles/booru-vars.scss
@@ -5,8 +5,15 @@ $padding-small: var(--padding-small);
 $padding-normal: var(--padding-normal);
 $padding-large: var(--padding-large);
 $block-spacing: var(--block-spacing);
+$block-header-light-color: var(--block-header-light-color);
+$block-header-link-text-color: var(--block-header-link-text-color);
+$border: var(--border);
+$header-spacing: var(--header-spacing);
+$block-header-sub-height: var(--block-header-sub-height);
 
 // These variables are defined dynamically based on the category of the tag
 $resolved-tag-background: var(--tag-background);
 $resolved-tag-border: var(--tag-border);
 $resolved-tag-color: var(--tag-color);
+
+$limited-layout-width: var(--limited-layout-width);
diff --git a/src/styles/content/duplicate-reports.scss b/src/styles/content/duplicate-reports.scss
new file mode 100644
index 0000000..e5f2a28
--- /dev/null
+++ b/src/styles/content/duplicate-reports.scss
@@ -0,0 +1,46 @@
+.dr__diff {
+  .source-icons {
+    &__list {
+      display: inline-flex;
+      gap: .25em;
+    }
+  }
+
+  td {
+    display: flex;
+    flex-wrap: wrap;
+    column-gap: .5em;
+  }
+}
+
+// Trying to make it more usable on mobile by regrouping table cells into grid.
+@media screen and (max-width: 800px) {
+  .dupe-report-list {
+    & > thead {
+      display: none;
+    }
+
+    & > tbody > tr {
+      display: grid;
+      grid-template-areas: "source target" "diff actions";
+      grid-template-columns: 1fr 1fr;
+
+      .dupe-report-list--image {
+        grid-area: source;
+        width: auto;
+
+        + .dupe-report-list--image {
+          grid-area: target;
+        }
+      }
+
+      .dr__diff {
+        grid-area: diff;
+
+        & + td {
+          grid-area: actions;
+        }
+      }
+    }
+  }
+}
diff --git a/src/styles/content/listing.scss b/src/styles/content/listing.scss
index 2306743..a296615 100644
--- a/src/styles/content/listing.scss
+++ b/src/styles/content/listing.scss
@@ -2,6 +2,38 @@
 @use '$styles/booru-vars';
 @use '$styles/environment';
 
+%box {
+  background: booru-vars.$background-color;
+  padding: 5px;
+}
+
+%tags-list {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 6px;
+
+  .tag {
+    margin: 0;
+  }
+}
+
+%toggleable-tag {
+  cursor: pointer;
+  user-select: none;
+  padding: 0 5px;
+  gap: 0;
+
+  &:hover {
+    background: booru-vars.$resolved-tag-color;
+    color: booru-vars.$resolved-tag-background;
+  }
+
+  &.is-missing:not(.is-added),
+  &.is-present.is-removed {
+    opacity: 0.5;
+  }
+}
+
 // This will fix wierd misplacing of the modified media boxes in the listing.
 .js-resizable-media-container {
   display: flex;
@@ -40,14 +72,14 @@
   }
 
   .maintenance-popup {
+    @extend %box;
+
     display: none;
     position: absolute;
     top: 100%;
-    padding: 5px;
     left: -50%;
     right: -50%;
     z-index: 8;
-    background: booru-vars.$background-color;
     border: {
       left: booru-vars.$media-border;
       right: booru-vars.$media-border;
@@ -55,31 +87,13 @@
     };
 
     .tags-list {
-      display: flex;
-      flex-wrap: wrap;
-      justify-content: center;
-      gap: 6px;
+      @extend %tags-list;
 
-      .tag {
-        margin: 0;
-      }
+      justify-content: center;
     }
 
     .tag {
-      cursor: pointer;
-      user-select: none;
-      padding: 0 5px;
-      gap: 0;
-
-      &:hover {
-        background: booru-vars.$resolved-tag-color;
-        color: booru-vars.$resolved-tag-background;
-      }
-
-      &.is-missing:not(.is-added),
-      &.is-present.is-removed {
-        opacity: 0.5;
-      }
+      @extend %toggleable-tag;
     }
   }
 
@@ -244,4 +258,64 @@
       opacity: 1;
     }
   }
+
+  .tags-panel {
+    @extend %box;
+
+    display: flex;
+    z-index: 1;
+    width: 96vw;
+    max-width: booru-vars.$limited-layout-width;
+    max-height: 50vh;
+    position: fixed;
+    bottom: 0;
+    left: 0;
+    right: 0;
+    margin-left: auto;
+    margin-right: auto;
+    transition: transform .25s ease-in-out;
+    border: {
+      top: booru-vars.$media-border;
+      left: booru-vars.$media-border;
+      right: booru-vars.$media-border;
+    }
+
+    &__toggle {
+      position: absolute;
+      left: -1px;
+      bottom: calc(100% + 1px);
+      border: booru-vars.$border;
+      background: booru-vars.$block-header-light-color;
+      color: booru-vars.$block-header-link-text-color;
+      font-weight: 700;
+      padding: 0 calc(#{booru-vars.$header-spacing} * .5);
+      line-height: booru-vars.$block-header-sub-height;
+      cursor: pointer;
+    }
+
+    &__scroller {
+      overflow-y: auto;
+      overflow-x: hidden;
+    }
+
+    &.is-collapsed {
+      transform: translateY(100%);
+    }
+
+    .tags-list {
+      @extend %tags-list;
+
+      &.is-hidden {
+        display: none;
+
+        & + hr {
+          display: none;
+        }
+      }
+    }
+
+    .tag {
+      @extend %toggleable-tag;
+    }
+  }
 }
diff --git a/tests/lib/extension/EntitiesController.spec.ts b/tests/lib/extension/EntitiesController.spec.ts
new file mode 100644
index 0000000..e3f44d0
--- /dev/null
+++ b/tests/lib/extension/EntitiesController.spec.ts
@@ -0,0 +1,261 @@
+import EntitiesController from "$lib/extension/EntitiesController";
+import ChromeStorageArea from "$tests/mocks/ChromeStorageArea";
+import StorageHelper from "$lib/browser/StorageHelper";
+import { TestedEntity, type TestedSettings } from "$tests/stubs/Entity";
+import { randomString } from "$tests/utils";
+import { randomInt } from "crypto";
+
+describe('EntitiesController', () => {
+  let mockedStorage: ChromeStorageArea;
+
+  beforeEach(() => {
+    mockedStorage = new ChromeStorageArea();
+    EntitiesController.storage = new StorageHelper(mockedStorage);
+  });
+
+  it('should throw when storage is not present', async () => {
+    EntitiesController.storage = null;
+
+    const readPromise = EntitiesController.readAllEntities(
+      TestedEntity._entityName,
+      TestedEntity,
+    );
+
+    const deletePromise = EntitiesController.deleteEntity(
+      TestedEntity._entityName,
+      randomString(),
+    );
+
+    const updatePromise = EntitiesController.updateEntity(
+      TestedEntity._entityName,
+      new TestedEntity(randomString(), {
+        numberField: randomInt(1000),
+        stringField: randomString(),
+      }),
+    );
+
+    const subscribe = () => {
+      EntitiesController.subscribeToEntity(TestedEntity._entityName, TestedEntity, vi.fn());
+    }
+
+    await expect(readPromise).rejects.toThrow(Error);
+    await expect(deletePromise).rejects.toThrow(Error);
+    await expect(updatePromise).rejects.toThrow(Error);
+
+    expect(subscribe).toThrow(Error);
+  });
+
+  describe('readAllEntities', () => {
+    it('should return empty array when nothing in the storage yet', async () => {
+      const entities = await EntitiesController.readAllEntities(TestedEntity._entityName, TestedEntity);
+      expect(entities).toHaveLength(0);
+    });
+
+    it('should properly capture different entities from storage', async () => {
+      const storageWithEntities: Record<string, Record<string, Partial<TestedSettings>>> = {
+        [TestedEntity._entityName]: {
+          [randomString()]: {
+            stringField: randomString(),
+            numberField: randomInt(-100_000, 100_000),
+          },
+          [randomString()]: {
+            stringField: randomString(),
+            numberField: randomInt(-100_000, 100_000),
+          },
+        }
+      };
+
+      mockedStorage.insertMockedData(storageWithEntities);
+
+      const loadedEntities = await EntitiesController.readAllEntities(TestedEntity._entityName, TestedEntity);
+
+      expect(loadedEntities).toHaveLength(2);
+
+      for (const entity of loadedEntities) {
+        const rawStorageEntry = storageWithEntities[TestedEntity._entityName][entity.id];
+
+        expect(entity.settings.stringField).toBe(rawStorageEntry.stringField);
+        expect(entity.settings.numberField).toBe(rawStorageEntry.numberField);
+      }
+    });
+  });
+
+  describe('updateEntity', () => {
+    it('should create a storage structure if it is not created yet', async () => {
+      expect(mockedStorage.mockedData).toEqual({});
+
+      const entity = new TestedEntity(randomString(), {
+        stringField: randomString(),
+        numberField: randomInt(100_000),
+      });
+
+      await EntitiesController.updateEntity(TestedEntity._entityName, entity);
+
+      expect(mockedStorage.mockedData).toEqual({
+        [TestedEntity._entityName]: {
+          [entity.id]: {
+            stringField: entity.settings.stringField,
+            numberField: entity.settings.numberField,
+          },
+        },
+      });
+    });
+
+    it('should update entity inside the existing', async () => {
+      const id = randomString();
+      const initialStringValue = randomString();
+      const updatedStringValue = randomString();
+
+      mockedStorage.insertMockedData({
+        [TestedEntity._entityName]: {
+          [id]: {
+            stringField: initialStringValue,
+            numberField: randomInt(100_000),
+          } as TestedSettings,
+        }
+      });
+
+      const [entity] = await EntitiesController.readAllEntities(TestedEntity._entityName, TestedEntity);
+      expect(entity.settings.stringField).toBe(initialStringValue);
+
+      entity.settings.stringField = updatedStringValue;
+      await EntitiesController.updateEntity(TestedEntity._entityName, entity);
+
+      const entityInsideStorage = mockedStorage.mockedData[TestedEntity._entityName][id];
+      expect(entityInsideStorage.stringField).toBe(updatedStringValue);
+    });
+  });
+
+  describe('deleteEntity', () => {
+    it('should initialize the storage structure if delete called', async () => {
+      expect(mockedStorage.mockedData).toEqual({});
+
+      await EntitiesController.deleteEntity(TestedEntity._entityName, randomString());
+
+      expect(mockedStorage.mockedData).toEqual({
+        [TestedEntity._entityName]: {},
+      });
+    });
+
+    it('should delete entity and keep the storage object empty', async () => {
+      const id = randomString();
+      const settings: TestedSettings = {
+        numberField: randomInt(100_000),
+        stringField: randomString(),
+      };
+
+      mockedStorage.insertMockedData({
+        [TestedEntity._entityName]: {
+          [id]: settings,
+        }
+      });
+
+      // Doesn't touch existing instance if ID is not found in the storage
+      await EntitiesController.deleteEntity(TestedEntity._entityName, randomString());
+
+      expect(mockedStorage.mockedData).toEqual({
+        [TestedEntity._entityName]: {
+          [id]: settings,
+        }
+      });
+
+      await EntitiesController.deleteEntity(TestedEntity._entityName, id);
+
+      expect(mockedStorage.mockedData).toEqual({
+        [TestedEntity._entityName]: {}
+      });
+    });
+  });
+
+  describe('subscribeToEntity', () => {
+    it('should notify about changes and return new entities', async () => {
+      let receivedEntities: TestedEntity[] | null = null;
+
+      const subscriber = vi.fn((entities: TestedEntity[]) => {
+        receivedEntities = entities;
+      });
+
+      void EntitiesController.subscribeToEntity(TestedEntity._entityName, TestedEntity, subscriber);
+
+      expect(subscriber).not.toHaveBeenCalled();
+
+      const createdEntity = new TestedEntity(randomString(), {
+        numberField: randomInt(100),
+        stringField: randomString(),
+      });
+
+      await EntitiesController.updateEntity(TestedEntity._entityName, createdEntity);
+
+      await vi.waitFor(() => {
+        expect(subscriber).toHaveBeenCalled();
+      }, {interval: 1, timeout: 10});
+
+      const [firstReceivedEntity] = receivedEntities || [];
+
+      expect(firstReceivedEntity).toBeInstanceOf(TestedEntity);
+      expect(firstReceivedEntity).not.toBe(createdEntity);
+      expect(firstReceivedEntity).toEqual(createdEntity);
+    });
+
+    it('should stop receiving updates once unsubscribed', async () => {
+      const firstSubscriber = vi.fn();
+      const unsubscribeFirst = EntitiesController.subscribeToEntity(TestedEntity._entityName, TestedEntity, firstSubscriber);
+
+      const entity = new TestedEntity(randomString(), {
+        numberField: randomInt(100_000),
+        stringField: randomString(),
+      });
+
+      await EntitiesController.updateEntity(TestedEntity._entityName, entity);
+
+      await vi.waitFor(() => {
+        expect(firstSubscriber).toHaveBeenCalledOnce();
+      }, {interval: 1, timeout: 10});
+
+      firstSubscriber.mockReset();
+      unsubscribeFirst();
+
+      const secondSubscriber = vi.fn();
+      void EntitiesController.subscribeToEntity(TestedEntity._entityName, TestedEntity, secondSubscriber);
+
+      entity.settings.stringField = randomString();
+
+      await EntitiesController.updateEntity(TestedEntity._entityName, entity);
+
+      await vi.waitFor(() => {
+        expect(secondSubscriber).toHaveBeenCalledOnce();
+      }, {interval: 1, timeout: 10});
+
+      expect(firstSubscriber).not.toHaveBeenCalled();
+    });
+
+    it('should not notify when something else was changed in the storage', async () => {
+      const rawStorageSubscriber = vi.fn();
+      const entitiesSubscriber = vi.fn();
+
+      void EntitiesController.storage?.subscribe(rawStorageSubscriber);
+      void EntitiesController.subscribeToEntity(TestedEntity._entityName, TestedEntity, entitiesSubscriber);
+
+      EntitiesController.storage?.write('otherStorage', {
+        someField: randomString(),
+      });
+
+      await EntitiesController.updateEntity(
+        TestedEntity._entityName,
+        new TestedEntity(randomString(), {
+          stringField: randomString(),
+          numberField: randomInt(100_000),
+        }),
+      );
+
+      EntitiesController.storage?.write('otherStorage', {
+        someField: randomString(),
+      });
+
+      await vi.waitFor(() => {
+        expect(entitiesSubscriber).toHaveBeenCalledOnce();
+        expect(rawStorageSubscriber).toHaveBeenCalledTimes(3);
+      }, {timeout: 10, interval: 1});
+    })
+  });
+});
diff --git a/tests/lib/extension/base/CachablePreferences.spec.ts b/tests/lib/extension/base/CachablePreferences.spec.ts
index 93a719e..ca91d51 100644
--- a/tests/lib/extension/base/CachablePreferences.spec.ts
+++ b/tests/lib/extension/base/CachablePreferences.spec.ts
@@ -1,50 +1,6 @@
-import CacheablePreferences, { PreferenceField, type WithFields } from "$lib/extension/base/CacheablePreferences";
-import ConfigurationController from "$lib/extension/ConfigurationController";
-import ChromeStorageArea from "$tests/mocks/ChromeStorageArea";
-import StorageHelper from "$lib/browser/StorageHelper";
 import { randomString } from "$tests/utils";
 import { randomInt } from "crypto";
-
-interface TestedFields {
-  numberField: number;
-  stringField: string;
-}
-
-class TestedPreferences extends CacheablePreferences<TestedFields> implements WithFields<TestedFields> {
-  readonly defaults: TestedFields;
-  readonly mockedSettingsNamespace: string;
-  readonly mockedStorageArea: ChromeStorageArea;
-  readonly mockedStorageHelper: StorageHelper;
-
-  numberField;
-  stringField;
-
-  constructor(settingsNamespace: string, mockedDefaults: TestedFields) {
-    const mockedStorageArea = new ChromeStorageArea();
-    const mockedStorageHelper = new StorageHelper(mockedStorageArea);
-    const mockedConfigurationController = new ConfigurationController(
-      settingsNamespace,
-      mockedStorageHelper,
-    );
-
-    super(settingsNamespace, mockedConfigurationController);
-
-    this.mockedSettingsNamespace = settingsNamespace;
-    this.mockedStorageArea = mockedStorageArea;
-    this.mockedStorageHelper = mockedStorageHelper;
-    this.defaults = mockedDefaults;
-
-    this.numberField = new PreferenceField(this, {
-      field: 'numberField',
-      defaultValue: this.defaults.numberField,
-    });
-
-    this.stringField = new PreferenceField(this, {
-      field: 'stringField',
-      defaultValue: this.defaults.stringField,
-    });
-  }
-}
+import { TestedPreferences } from "$tests/stubs/Preferences";
 
 describe('CachablePreferences', () => {
   let preferences: TestedPreferences;
diff --git a/tests/lib/extension/base/StorageEntity.spec.ts b/tests/lib/extension/base/StorageEntity.spec.ts
new file mode 100644
index 0000000..e213799
--- /dev/null
+++ b/tests/lib/extension/base/StorageEntity.spec.ts
@@ -0,0 +1,239 @@
+import ChromeStorageArea from "$tests/mocks/ChromeStorageArea";
+import StorageHelper from "$lib/browser/StorageHelper";
+import { randomString } from "$tests/utils";
+import { randomInt } from "crypto";
+import EntitiesController from "$lib/extension/EntitiesController";
+import { TestedEntity } from "$tests/stubs/Entity";
+
+describe("StorageEntity", () => {
+  let mockedStorageArea: ChromeStorageArea;
+
+  beforeEach(() => {
+    mockedStorageArea = new ChromeStorageArea();
+    EntitiesController.storage = new StorageHelper(mockedStorageArea);
+  });
+
+  describe("readAll", () => {
+    it("should return empty array if no entities stored", async () => {
+      const entities = await TestedEntity.readAll();
+
+      expect(entities).toHaveLength(0);
+    });
+
+    it("should read all entities from storage", async () => {
+      const entity1 = new TestedEntity(randomString(), {
+        stringField: randomString(),
+        numberField: randomInt(-100000, 100000),
+      });
+
+      const entity2 = new TestedEntity(randomString(), {
+        stringField: randomString(),
+        numberField: randomInt(-100000, 100000),
+      });
+
+      await entity1.save();
+      await entity2.save();
+
+      const entities = await TestedEntity.readAll();
+
+      expect(entities).toHaveLength(2);
+      expect(entities[0].id).toBe(entity1.id);
+      expect(entities[0].settings).toEqual(entity1.settings);
+      expect(entities[1].id).toBe(entity2.id);
+      expect(entities[1].settings).toEqual(entity2.settings);
+    });
+
+    it("should build entities with correct class", async () => {
+      const entity = new TestedEntity(randomString(), {
+        stringField: randomString(),
+        numberField: randomInt(-100000, 100000),
+      });
+
+      await entity.save();
+
+      const [savedEntity] = await TestedEntity.readAll();
+
+      expect(savedEntity).toBeInstanceOf(TestedEntity);
+    });
+  });
+
+  describe("save", () => {
+    it("should save entity to storage", async () => {
+      const entity = new TestedEntity(randomString(), {
+        stringField: randomString(),
+        numberField: randomInt(-100000, 100000),
+      });
+
+      await entity.save();
+
+      expect(mockedStorageArea.mockedData).toEqual({
+        [TestedEntity._entityName]: {
+          [entity.id]: entity.settings,
+        },
+      });
+    });
+
+    it("should overwrite existing entity with same ID", async () => {
+      const id = randomString();
+      const originalSettings = {
+        stringField: randomString(),
+        numberField: randomInt(-100000, 100000),
+      };
+
+      const entity1 = new TestedEntity(id, originalSettings);
+      await entity1.save();
+
+      const updatedSettings = {
+        stringField: randomString(),
+        numberField: randomInt(-100000, 100000),
+      };
+
+      const entity2 = new TestedEntity(id, updatedSettings);
+      await entity2.save();
+
+      expect(mockedStorageArea.mockedData).toEqual({
+        [TestedEntity._entityName]: {
+          [id]: updatedSettings,
+        },
+      });
+    });
+  });
+
+  describe("delete", () => {
+    it("should delete entity from storage", async () => {
+      const entity = new TestedEntity(randomString(), {
+        stringField: randomString(),
+        numberField: randomInt(-100000, 100000),
+      });
+
+      await entity.save();
+      expect(mockedStorageArea.mockedData[TestedEntity._entityName]).not.toEqual({});
+
+      await entity.delete();
+      expect(mockedStorageArea.mockedData[TestedEntity._entityName]).toEqual({});
+    });
+
+    it("should not fail if entity does not exist", async () => {
+      const entity = new TestedEntity(randomString(), {
+        stringField: randomString(),
+        numberField: randomInt(-100000, 100000),
+      });
+
+      await expect(entity.delete()).resolves.not.toThrow();
+    });
+  });
+
+  describe("subscribe", () => {
+    it("should notify about new entities", async () => {
+      const subscriber = vi.fn();
+      void TestedEntity.subscribe(subscriber);
+
+      const entity = new TestedEntity(randomString(), {
+        stringField: randomString(),
+        numberField: randomInt(-100000, 100000),
+      });
+
+      await entity.save();
+
+      // Saving is not notified about immediately.
+      await vi.waitFor(() => {
+        expect(subscriber).toHaveBeenCalledOnce();
+        expect(subscriber).toHaveBeenCalledWith([entity]);
+      }, {timeout: 10, interval: 1});
+    });
+
+    it("should notify about entity updates", async () => {
+      const subscriber = vi.fn();
+      void TestedEntity.subscribe(subscriber);
+
+      const entity = new TestedEntity(randomString(), {
+        stringField: randomString(),
+        numberField: randomInt(-100000, 100000),
+      });
+
+      await entity.save();
+
+      await vi.waitFor(() => {
+        expect(subscriber).toHaveBeenCalledOnce();
+      }, {interval: 1, timeout: 10});
+
+      subscriber.mockReset();
+
+      entity.settings.stringField = randomString();
+      await entity.save();
+
+      await vi.waitFor(() => {
+        expect(subscriber).toHaveBeenCalledOnce();
+        expect(subscriber).toHaveBeenCalledWith([entity]);
+      }, {interval: 1, timeout: 10});
+    });
+
+    it("should notify about entity deletion", async () => {
+      const subscriber = vi.fn();
+      void TestedEntity.subscribe(subscriber);
+
+      const entity = new TestedEntity(randomString(), {
+        stringField: randomString(),
+        numberField: randomInt(-100000, 100000),
+      });
+
+      await entity.save();
+      await entity.delete();
+
+      await vi.waitFor(() => {
+        expect(subscriber).toHaveBeenCalledTimes(2);
+      }, {interval: 1, timeout: 10});
+
+      expect(subscriber).toHaveBeenCalledWith([entity]);
+      expect(subscriber).toHaveBeenCalledWith([]);
+    });
+
+    it("should stop notifications after unsubscribe", async () => {
+      const subscriber = vi.fn();
+      const unsubscribe = TestedEntity.subscribe(subscriber);
+
+      unsubscribe();
+
+      const entity = new TestedEntity(randomString(), {
+        stringField: randomString(),
+        numberField: randomInt(-100000, 100000),
+      });
+
+      await entity.save();
+
+      expect(subscriber).not.toHaveBeenCalled();
+    });
+  });
+
+  describe("properties", () => {
+    it("should expose id", () => {
+      const id = randomString();
+      const entity = new TestedEntity(id, {
+        stringField: randomString(),
+        numberField: randomInt(-100000, 100000),
+      });
+
+      expect(entity.id).toBe(id);
+    });
+
+    it("should expose settings", () => {
+      const settings = {
+        stringField: randomString(),
+        numberField: randomInt(-100000, 100000),
+      };
+
+      const entity = new TestedEntity(randomString(), settings);
+
+      expect(entity.settings).toEqual(settings);
+    });
+
+    it("should expose type from _entityName", () => {
+      const entity = new TestedEntity(randomString(), {
+        stringField: randomString(),
+        numberField: randomInt(-100000, 100000),
+      });
+
+      expect(entity.type).toBe(TestedEntity._entityName);
+    });
+  });
+});
diff --git a/tests/lib/philomena/tag-utils.spec.ts b/tests/lib/philomena/tag-utils.spec.ts
index a322a07..e04221e 100644
--- a/tests/lib/philomena/tag-utils.spec.ts
+++ b/tests/lib/philomena/tag-utils.spec.ts
@@ -1,76 +1,141 @@
 import { URL } from 'url';
-import { resolveTagNameFromLink, slugEncodedCharacters } from '$lib/philomena/tag-utils';
+import {
+  buildTagsAndAliasesMap,
+  resolveTagCategoryFromTagName,
+  resolveTagNameFromLink,
+  slugEncodedCharacters
+} from '$lib/philomena/tag-utils';
+import { randomString } from "$tests/utils";
+import { namespaceCategories } from "$config/tags";
 
-describe('tag-utils', () => {
-  const origin = 'https://furbooru.org';
+const origin = 'https://furbooru.org';
 
-  describe('resolveTagNameFromLink', () => {
-    function resolveFromSearchQuery(encodedQuery: string): string | null {
-      return resolveTagNameFromLink(new URL(`/search?q=${encodedQuery}`, origin));
-    }
+describe('buildTagsAndAliasesMap', () => {
+  it('should return regular tags if both real and real+alias tags are the same', () => {
+    const tagsAndAliases = ['avali', 'experiment (casualties unknown)', 'fictional species'];
 
-    describe('Parsing from /search/?q=tag links', () => {
-      it('should resolve a single tag from /search URLs', () => {
-        expect(resolveFromSearchQuery('safe')).toBe('safe');
-      });
-
-      it('should return null for queries with multiple comma-separated tags', () => {
-        // Comma acts as a separator in the query, resulting in multiple tokens
-        expect(resolveFromSearchQuery('safe, suggestive')).toBe(null);
-      });
-
-      it('should return null if query is empty or not a term', () => {
-        expect(resolveFromSearchQuery('')).toBe(null);
-        expect(resolveFromSearchQuery('!')).toBe(null);
-      });
-
-      it('should properly treat parentheses in the query with single tag', () => {
-        // Parentheses are operators in the query language, but when inside the tag name, they should still be properly
-        // working.
-        expect(resolveFromSearchQuery('experiment (casualties unknown)')).toBe('experiment (casualties unknown)');
-      });
-
-      it('should properly resolve queries with encoded characters', () => {
-        expect(resolveFromSearchQuery('pok%C3%A9mon')).toBe('pokémon');
-      });
-
-      it('should unquote quoted term', () => {
-        expect(resolveFromSearchQuery('"experiment (casualties unknown)"')).toBe('experiment (casualties unknown)')
-        expect(resolveFromSearchQuery('"single tag, really"')).toBe('single tag, really');
-      });
-    })
-
-    describe('Parsing from /tags/name links', () => {
-      function resolveFromTagLink(encodedTagName: string): string | null {
-        return resolveTagNameFromLink(new URL(`/tags/${encodedTagName}`, origin));
+    expect(buildTagsAndAliasesMap(tagsAndAliases, tagsAndAliases)).toMatchInlineSnapshot(`
+      Map {
+        "avali" => "avali",
+        "experiment (casualties unknown)" => "experiment (casualties unknown)",
+        "fictional species" => "fictional species",
       }
+    `);
+  });
 
-      it('should resolve a single tag', () => {
-        expect(resolveFromTagLink('safe')).toBe('safe');
-      });
+  it('should identify any aliases going after the real tag', () => {
+    const realTags = ['avali', 'experiment (casualties unknown)', 'fictional species'];
+    const realAndAliasesTags = ['avali', 'experiment (casualties unknown)', 'experiment (gunsaw)', 'fictional species'];
 
-      it('should only read the tag page even if query is provided', () => {
-        expect(resolveFromTagLink('grotesque?q=explicit')).toBe('grotesque');
-      });
+    expect(buildTagsAndAliasesMap(realAndAliasesTags, realTags)).toMatchInlineSnapshot(`
+      Map {
+        "avali" => "avali",
+        "experiment (casualties unknown)" => "experiment (casualties unknown)",
+        "fictional species" => "fictional species",
+        "experiment (gunsaw)" => "experiment (casualties unknown)",
+      }
+    `);
+  });
 
-      it('should properly resolve links with encoded characters', () => {
-        expect(resolveFromTagLink('pok%C3%A9mon')).toBe('pokémon');
-      });
+  it('should ignore any non-real tags coming before first tag is found', () => {
+    const outOfOrderTag = randomString();
 
-      it('should decoded slug-encoded characters', () => {
-        // More common example where tag is.
-        expect(resolveFromTagLink(`namespace-colon-tag+name`)).toBe('namespace:tag name');
+    const realTags = ['avali', 'experiment (casualties unknown)', 'fictional species'];
+    const realAndAliasesTags = [outOfOrderTag, 'avali', 'experiment (casualties unknown)', 'experiment (gunsaw)', 'fictional species'];
 
-        // Testing the whole list of encoded characters.
-        for (const [encodedCharacter, decodedCharacter] of slugEncodedCharacters.entries()) {
-          expect(resolveFromTagLink(`test+symbol${encodedCharacter}without+spaces`)).toBe(`test symbol${decodedCharacter}without spaces`);
-          expect(resolveFromTagLink(`test+symbol+${encodedCharacter}+with+spaces`)).toBe(`test symbol ${decodedCharacter} with spaces`);
-        }
-      });
-    });
+    const warn = vi.spyOn(console, 'warn');
 
-    it('should return null for unsupported URLs', () => {
-      expect(resolveTagNameFromLink(new URL('/pages/example', origin))).toBe(null);
+    expect(buildTagsAndAliasesMap(realAndAliasesTags, realTags)).toMatchInlineSnapshot(`
+      Map {
+        "avali" => "avali",
+        "experiment (casualties unknown)" => "experiment (casualties unknown)",
+        "fictional species" => "fictional species",
+        "experiment (gunsaw)" => "experiment (casualties unknown)",
+      }
+    `);
+
+    expect(warn).toHaveBeenCalledWith(`No real tag found for the alias:`, outOfOrderTag);
+  });
+});
+
+describe('resolveTagNameFromLink', () => {
+  function resolveFromSearchQuery(encodedQuery: string): string | null {
+    return resolveTagNameFromLink(new URL(`/search?q=${encodedQuery}`, origin));
+  }
+
+  describe('Parsing from /search/?q=tag links', () => {
+    it('should resolve a single tag from /search URLs', () => {
+      expect(resolveFromSearchQuery('safe')).toBe('safe');
     });
+
+    it('should return null for queries with multiple comma-separated tags', () => {
+      // Comma acts as a separator in the query, resulting in multiple tokens
+      expect(resolveFromSearchQuery('safe, suggestive')).toBe(null);
+    });
+
+    it('should return null if query is empty or not a term', () => {
+      expect(resolveFromSearchQuery('')).toBe(null);
+      expect(resolveFromSearchQuery('!')).toBe(null);
+    });
+
+    it('should properly treat parentheses in the query with single tag', () => {
+      // Parentheses are operators in the query language, but when inside the tag name, they should still be properly
+      // working.
+      expect(resolveFromSearchQuery('experiment (casualties unknown)')).toBe('experiment (casualties unknown)');
+    });
+
+    it('should properly resolve queries with encoded characters', () => {
+      expect(resolveFromSearchQuery('pok%C3%A9mon')).toBe('pokémon');
+    });
+
+    it('should unquote quoted term', () => {
+      expect(resolveFromSearchQuery('"experiment (casualties unknown)"')).toBe('experiment (casualties unknown)')
+      expect(resolveFromSearchQuery('"single tag, really"')).toBe('single tag, really');
+    });
+  })
+
+  describe('Parsing from /tags/name links', () => {
+    function resolveFromTagLink(encodedTagName: string): string | null {
+      return resolveTagNameFromLink(new URL(`/tags/${encodedTagName}`, origin));
+    }
+
+    it('should resolve a single tag', () => {
+      expect(resolveFromTagLink('safe')).toBe('safe');
+    });
+
+    it('should only read the tag page even if query is provided', () => {
+      expect(resolveFromTagLink('grotesque?q=explicit')).toBe('grotesque');
+    });
+
+    it('should properly resolve links with encoded characters', () => {
+      expect(resolveFromTagLink('pok%C3%A9mon')).toBe('pokémon');
+    });
+
+    it('should decoded slug-encoded characters', () => {
+      // More common example where tag is.
+      expect(resolveFromTagLink(`namespace-colon-tag+name`)).toBe('namespace:tag name');
+
+      // Testing the whole list of encoded characters.
+      for (const [encodedCharacter, decodedCharacter] of slugEncodedCharacters.entries()) {
+        expect(resolveFromTagLink(`test+symbol${encodedCharacter}without+spaces`)).toBe(`test symbol${decodedCharacter}without spaces`);
+        expect(resolveFromTagLink(`test+symbol+${encodedCharacter}+with+spaces`)).toBe(`test symbol ${decodedCharacter} with spaces`);
+      }
+    });
+  });
+
+  it('should return null for unsupported URLs', () => {
+    expect(resolveTagNameFromLink(new URL('/pages/example', origin))).toBe(null);
+  });
+});
+
+describe('resolveTagCategoryFromTagName', () => {
+  it('should resolve any known namespace into its known category', () => {
+    for (const [namespace, category] of namespaceCategories) {
+      expect(resolveTagCategoryFromTagName(`${namespace}:${randomString()}`)).toBe(category);
+    }
+  });
+
+  it('should ignore any namespace not listed in config', () => {
+    expect(resolveTagCategoryFromTagName(`${randomString()}:${randomString()}`)).toBeNull();
   });
 });
diff --git a/tests/stubs/Entity.ts b/tests/stubs/Entity.ts
new file mode 100644
index 0000000..6e65521
--- /dev/null
+++ b/tests/stubs/Entity.ts
@@ -0,0 +1,17 @@
+import StorageEntity from "$lib/extension/base/StorageEntity";
+
+export interface TestedSettings {
+  stringField: string;
+  numberField: number;
+  nested?: {
+    field: boolean;
+  };
+}
+
+export class TestedEntity extends StorageEntity<TestedSettings> {
+  static readonly _entityName = "entity";
+
+  constructor(id: string, settings: TestedSettings) {
+    super(id, settings);
+  }
+}
diff --git a/tests/stubs/Preferences.ts b/tests/stubs/Preferences.ts
new file mode 100644
index 0000000..d21c4ea
--- /dev/null
+++ b/tests/stubs/Preferences.ts
@@ -0,0 +1,45 @@
+import CacheablePreferences, { PreferenceField, type WithFields } from "$lib/extension/base/CacheablePreferences";
+import ChromeStorageArea from "$tests/mocks/ChromeStorageArea";
+import StorageHelper from "$lib/browser/StorageHelper";
+import ConfigurationController from "$lib/extension/ConfigurationController";
+
+export interface TestedFields {
+  numberField: number;
+  stringField: string;
+}
+
+export class TestedPreferences extends CacheablePreferences<TestedFields> implements WithFields<TestedFields> {
+  readonly defaults: TestedFields;
+  readonly mockedSettingsNamespace: string;
+  readonly mockedStorageArea: ChromeStorageArea;
+  readonly mockedStorageHelper: StorageHelper;
+
+  numberField;
+  stringField;
+
+  constructor(settingsNamespace: string, mockedDefaults: TestedFields) {
+    const mockedStorageArea = new ChromeStorageArea();
+    const mockedStorageHelper = new StorageHelper(mockedStorageArea);
+    const mockedConfigurationController = new ConfigurationController(
+      settingsNamespace,
+      mockedStorageHelper,
+    );
+
+    super(settingsNamespace, mockedConfigurationController);
+
+    this.mockedSettingsNamespace = settingsNamespace;
+    this.mockedStorageArea = mockedStorageArea;
+    this.mockedStorageHelper = mockedStorageHelper;
+    this.defaults = mockedDefaults;
+
+    this.numberField = new PreferenceField(this, {
+      field: 'numberField',
+      defaultValue: this.defaults.numberField,
+    });
+
+    this.stringField = new PreferenceField(this, {
+      field: 'stringField',
+      defaultValue: this.defaults.stringField,
+    });
+  }
+}