Examine source code of YouTube Copy

{
  "manifest_version": 2,
  "name": "YouTube Copy",
  "version": "1001",
  "description": "Copy the YouTube URL without the extra parameters",
  "permissions": [
    "activeTab"
  ],
  "icons": {
    "128": "icon128.png"
  },
  "browser_action": {
    "default_icon": {
      "128": "icon128.png"
    },
    "default_title": "YouTube Copy"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "commands": {
    "copy": {
      "description": "Copy the YouTube URL"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{4968b99e-2cc7-4eea-b459-41312910991b}"
    }
  }
}