Examine source code of KDE Connect

{
  "manifest_version": 2,
  "name": "KDE Connect",
  "short_name": "kdeconnect",
  "description": "Allows sharing pages, videos, and images from your browser to KDE Connect devices.",
  "version": "0.1.7",
  "homepage_url": "https://github.com/pdf/kdeconnect-chrome-extension",
  "browser_action": {
    "default_title": "KDE Connect",
    "default_popup": "popup.html",
    "default_icon": {
      "16": "images/kdeconnect-16.png",
      "22": "images/kdeconnect-22.png",
      "24": "images/kdeconnect-24.png",
      "32": "images/kdeconnect-32.png",
      "48": "images/kdeconnect-48.png",
      "64": "images/kdeconnect-64.png",
      "128": "images/kdeconnect-128.png",
      "256": "images/kdeconnect-256.png"
    }
  },
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Alt+C"
      }
    }
  },
  "options_ui": {
    "page": "options.html",
    "chrome_style": true
  },
  "background": {
    "page": "background.html"
  },
  "permissions": [
    "nativeMessaging",
    "storage",
    "tabs",
    "contextMenus"
  ],
  "icons": {
    "16": "images/kdeconnect-16.png",
    "22": "images/kdeconnect-22.png",
    "24": "images/kdeconnect-24.png",
    "32": "images/kdeconnect-32.png",
    "48": "images/kdeconnect-48.png",
    "64": "images/kdeconnect-64.png",
    "128": "images/kdeconnect-128.png",
    "256": "images/kdeconnect-256.png"
  },
  "applications": {
    "gecko": {
      "id": "kde-connect@0xc0dedbad.com"
    }
  }
}