Examine source code of UC Manager

{
  "author": "Axeos",
  "homepage_url": "https://axeos.com",
  "background": {
    "page": "background.html"
  },
  "browser_action": {
    "default_title": "UC Manager",
    "default_icon": {
      "128": "assets/icon_128.png"
    }
  },
  "applications": {
    "gecko": {
      "id": "ucmanager_webextension@qi"
    }
  },
  "content_scripts": [
    {
      "all_frames": true,
      "css": [
        "content/custom_design.css"
      ],
      "js": [
        "content/content.js",
        "content/interface_processing.js"
      ],
      "matches": [
        "<all_urls>"
      ],
      "run_at": "document_idle"
    }
  ],
  "default_locale": "nl",
  "description": "__MSG_extensionDescription__",
  "icons": {
    "16": "assets/icon.png",
    "32": "assets/icon_32.png",
    "48": "assets/icon_48.png",
    "64": "assets/icon_64.png",
    "128": "assets/icon_128.png"
  },
  "manifest_version": 2,
  "name": "UC Manager",
  "permissions": [
    "activeTab",
    "tabs",
    "contextMenus",
    "storage"
  ],
  "short_name": "UC Manager",
  "version": "1.0.17"
}