Examine source code of Firescape Navigator

{
  "manifest_version": 2,
  "name": "Firescape Navigator",
  "description": "Show the Netscape Navigator or Internet Explorer loading animation in Firefox",
  "version": "1.2.1resigned1",
  "icons": {
    "16": "logo/logo16.png",
    "48": "logo/logo48.png",
    "128": "logo/logo128.png"
  },
  "browser_action": {
    "default_icon": "logo/logo16.png"
  },
  "background": {
    "scripts": [
      "script.js"
    ]
  },
  "options_ui": {
    "page": "options/options.html"
  },
  "permissions": [
    "activeTab",
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{99138ee6-534b-402d-b59d-29b29b786867}"
    }
  }
}