Examine source code of PHP Bookmarks

{
  "manifest_version": 2,
  "name": "PHP-Bookmarks Browser Plugin",
  "version": "1.0.1resigned1",
  "description": "Browser plugin for a faster access to bookmarks of PHP-Bookmarks.",
  "icons": {
    "16": "images/php-bookmarks-16.png",
    "32": "images/php-bookmarks-32.png",
    "48": "images/php-bookmarks-48.png"
  },
  "browser_action": {
    "default_icon": "images/php-bookmarks-32.png",
    "default_title": "PHP-Bookmarks"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "<all_urls>",
    "tabs",
    "storage"
  ],
  "options_ui": {
    "page": "options.html"
  },
  "applications": {
    "gecko": {
      "id": "php-bookmarks@jonas-hellmann.de"
    }
  }
}