Examine source code of BBViewer

{
  "manifest_version": 3,
  "name": "BBViewer",
  "description": "Enhance your video viewing experience.",
  "version": "2.1.0",
  "icons": {
    "16": "src/assets/icons/icon-16.png",
    "32": "src/assets/icons/icon-32.png",
    "48": "src/assets/icons/icon-48.png",
    "128": "src/assets/icons/icon-128.png"
  },
  "content_scripts": [
    {
      "js": [
        "assets/index.ts-loader-820b2ee3.js"
      ],
      "matches": [
        "*://*/*"
      ],
      "css": [
        "assets/index-5b1e5def.css"
      ]
    }
  ],
  "background": {
    "scripts": [
      "service-worker-loader.js"
    ],
    "type": "module"
  },
  "action": {
    "default_popup": "src/popup/popup.html",
    "default_icon": {
      "16": "src/assets/icons/icon-16.png",
      "32": "src/assets/icons/icon-32.png",
      "48": "src/assets/icons/icon-48.png",
      "128": "src/assets/icons/icon-128.png"
    }
  },
  "permissions": [
    "storage",
    "tabs"
  ],
  "web_accessible_resources": [
    {
      "matches": [
        "*://*/*"
      ],
      "resources": [
        "images/*",
        "src/scripts/sites/BBLF/inject.js",
        "assets/index-cce0fb26.js",
        "assets/index.ts-59ea599b.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "bbviewer@goodiesfor.me"
    }
  }
}