Examine source code of Cronox

{
  "manifest_version": 2,
  "name": "Cronox",
  "version": "1.0",
  "description": "__MSG_extDesc__",
  "homepage_url": "https://github.com/UlisesFco/cronox",
  "icons": {
    "48": "icons/cronox-48.png",
    "96": "icons/cronox-96.png"
  },
  "browser_action": {
    "default_icon": "icons/cronox-32.png",
    "default_title": "Cronox",
    "default_popup": "popups/popup.html"
  },
  "default_locale": "en",
  "browser_specific_settings": {
    "gecko": {
      "id": "{1739a466-1e04-4ba7-adef-1099cd87c47b}"
    }
  }
}