Examine source code of GW Locate

{
  "manifest_version": 2,
  "name": "__MSG_extensionName__",
  "version": "1.1.2resigned1",
  "description": "__MSG_extensionDescription__",
  "default_locale": "en",
  "icons": {
    "48": "icons/direction-path-48.png"
  },
  "permissions": [
    "activeTab",
    "tabs"
  ],
  "page_action": {
    "default_icon": "button/direction-path-19.png",
    "default_title": "__MSG_defaultTitle__",
    "browser_style": true
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{f20546ae-25e0-4829-8a88-b407e16d6771}"
    }
  }
}