Examine source code of Prayer Times

{
  "name": "Prayer Times",
  "version": "1.0.0",
  "manifest_version": 2,
  "description": "Display daily Muslim prayer times",
  "homepage_url": "http://praytimes.org",
  "author": "Abd-El-Rahman Nasser",
  "icons": {
    "128": "icons/icon.png",
    "768": "icons/icon768.png"
  },
  "background": {
    "page": "src/bg/background.html"
  },
  "browser_action": {
    "default_icon": "icons/icon.png",
    "default_title": "Prayer Times!",
    "default_popup": "src/popup/popup.html"
  },
  "options_ui": {
    "page": "src/options/options.html",
    "open_in_tab": true
  },
  "permissions": [
    "storage",
    "notifications",
    "alarms"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "prayer-times@abdo.net"
    }
  }
}