Examine source code of HaveTab

{
  "manifest_version": 2,
  "name": "__MSG_appName__",
  "description": "__MSG_appDesc__",
  "default_locale": "en",
  "version": "1.0.6",
  "browser_action": {
    "default_icon": "icon.png"
  },
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "options_page": "options.html",
  "browser_specific_settings": {
    "gecko": {
      "id": "{1fb73545-1fa5-4a72-a7e7-d4079622fb8c}"
    }
  }
}