Examine source code of Enhanced Tab Pinner

{
  "manifest_version": 2,
  "name": "Enhanced Tab Pinner",
  "version": "1.0",
  "description": "Easily pin and manage tabs in Firefox.",
  "permissions": [
    "tabs"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_title": "Pin/Unpin Tab"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{4ae9b22a-14fb-4e07-b184-26b35aabc309}"
    }
  }
}