Examine source code of Simple Screen Recorder

{
  "manifest_version": 2,
  "name": "Screen Recorder",
  "version": "1.3",
  "description": "Record your screen and audio",
  "permissions": [
    "activeTab",
    "storage",
    "scripting",
    "tabs"
  ],
  "browser_action": {
    "default_icon": {
      "128": "icons/icon128.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{da585003-26a3-4630-a593-78e55787332d}"
    }
  }
}