Examine source code of The Time Zone Changer

{
  "version": "1.3.0",
  "manifest_version": 2,
  "short_name": "change-timezone",
  "name": "Time Zone Changer",
  "background": {
    "page": "lib/chrome/background.html"
  },
  "permissions": [
    "*://*/*",
    "storage",
    "contextMenus",
    "webNavigation"
  ],
  "description": "Easy time zone change.",
  "options_ui": {
    "open_in_tab": true,
    "chrome_style": true,
    "page": "data/options/options.html"
  },
  "browser_action": {
    "default_title": "Time Zone Changer",
    "default_icon": {
      "16": "data/icons/16.png",
      "32": "data/icons/32.png",
      "48": "data/icons/48.png",
      "64": "data/icons/64.png"
    }
  },
  "icons": {
    "16": "data/icons/16.png",
    "32": "data/icons/32.png",
    "48": "data/icons/48.png",
    "64": "data/icons/64.png",
    "128": "data/icons/128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{83a8f698-d678-435f-b441-ebd643534fe7}"
    }
  }
}