Examine source code of Language Translator

{
  "manifest_version": 2,
  "name": "Language Translator",
  "version": "1.0",
  "description": "A simple addon to quickly translate text using the Google Translate API.",
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icon.png"
  },
  "permissions": [
    "storage",
    "https://translate.googleapis.com/"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{ccfc4087-03fb-4f07-939f-68785c635a12}"
    }
  }
}