Examine source code of YouTube Channel Filter

{
  "manifest_version": 3,
  "name": "YouTube Channel Filter",
  "version": "1.9.0",
  "description": "Hide recommendations from channels you choose on YouTube.",
  "permissions": [
    "storage",
    "tabs"
  ],
  "host_permissions": [
    "*://www.youtube.com/*",
    "*://m.youtube.com/*",
    "*://youtube.com/*"
  ],
  "action": {
    "default_title": "YouTube Channel Filter",
    "default_popup": "popup.html"
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "content_scripts": [
    {
      "matches": [
        "*://www.youtube.com/*",
        "*://m.youtube.com/*",
        "*://youtube.com/*"
      ],
      "js": [
        "identity.js",
        "content.js"
      ],
      "css": [
        "content.css"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "youtube-channel-filter@local",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "browsingActivity"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  }
}