Examine source code of Screen Recorder

{
  "manifest_version": 2,
  "name": "Screen Recorder",
  "version": "1.0",
  "description": "Record your screen and save it as a video file.",
  "permissions": [
    "activeTab",
    "storage"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{2d27a20c-c178-4200-b947-dea5df292d9a}"
    }
  }
}