Examine source code of Pray Times!

{
  "name": "Pray Times!",
  "version": "2.2.6",
  "manifest_version": 2,
  "description": "Display daily Muslim prayer times",
  "homepage_url": "http://praytimes.org",
  "author": "Hamid Zarrabi-Zadeh",
  "icons": {
    "128": "icons/icon.png",
    "768": "icons/icon768.png"
  },
  "background": {
    "page": "src/bg/background.html"
  },
  "browser_action": {
    "default_icon": "icons/icon.png",
    "default_title": "Pray Times!",
    "default_popup": "src/popup/popup.html"
  },
  "options_ui": {
    "page": "src/options/options.html",
    "open_in_tab": true
  },
  "permissions": [
    "storage",
    "notifications",
    "alarms",
    "geolocation",
    "https://*.search.hereapi.com/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "azan-times@hamid.net"
    }
  }
}