Examine source code of BrainRotBlock

{
  "manifest_version": 3,
  "name": "BrainRotBlock",
  "version": "0.1.3",
  "description": "Block YouTube shorts and other 'brainrot' short-form video feeds. Protect your attention span.",
  "action": {
    "default_popup": "ui/popup.html"
  },
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "permissions": [
    "storage",
    "webNavigation"
  ],
  "host_permissions": [
    "*://*.youtube.com/*",
    "*://m.youtube.com/*",
    "*://*.youtubei.googleapis.com/*"
  ],
  "background": {
    "scripts": [
      "background.bundle.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*",
        "*://m.youtube.com/*"
      ],
      "js": [
        "content/yt.js"
      ],
      "run_at": "document_start",
      "all_frames": true
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "brb@slouchy.media",
      "strict_min_version": "109.0"
    }
  }
}