Examine source code of Simple time track

{
  "manifest_version": 2,
  "name": "Simple time track",
  "version": "1.2.0.2resigned1",
  "description": "Application for time tracking of tasks",
  "default_locale": "en",
  "options_ui": {
    "page": "options.html",
    "chrome_style": true
  },
  "icons": {
    "16": "16.png",
    "32": "32.png",
    "48": "49.png",
    "128": "128.png"
  },
  "permissions": [
    "activeTab",
    "storage",
    "http://*/*"
  ],
  "short_name": "STTrack",
  "browser_action": {
    "default_title": "Simple time track",
    "default_icon": "49.png",
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{0622752d-6b12-4ea1-92f4-72e14083fa2d}"
    }
  }
}