Examine source code of blatube.com

{
  "manifest_version": 3,
  "name": "BlaTube",
  "description": "Finds supported videos on the page and opens BlaTube room creation with provider type and video ID.",
  "host_permissions": [
    "<all_urls>"
  ],
  "permissions": [
    "activeTab"
  ],
  "action": {
    "default_title": "BlaTube",
    "default_popup": "popup/popup.html",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    }
  },
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "constants.js",
        "providers.js",
        "content.js"
      ],
      "run_at": "document_start",
      "all_frames": true,
      "match_about_blank": true
    }
  ],
  "background": {
    "scripts": [
      "constants.js",
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "admin@bltube.com",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "version": "11.0.3.22"
}