Examine source code of Ethiopian date

{
  "name": "Ethiopian date",
  "description": "show ethiopian local and GMT date",
  "version": "1.1.0",
  "manifest_version": 2,
  "browser_action": {
    "default_popup": "index.html",
    "default_title": "Ethiopian date",
    "default_icon": {
      "48": "logo48.png",
      "96": "logo96.png"
    }
  },
  "icons": {
    "48": "logo48.png",
    "96": "logo96.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{223687cb-0bdd-4375-a8a7-3b099bcf44ac}"
    }
  }
}