Examine source code of Clean Link

{
  "manifest_version": 2,
  "name": "Clean Link",
  "version": "1.0.0",
  "description": "Remove tracking parameters (utm_*, fbclid, gclid, etc.) from URLs. Copy clean link for page or any link via right-click.",
  "permissions": [
    "contextMenus",
    "tabs",
    "clipboardWrite",
    "notifications",
    "activeTab"
  ],
  "background": {
    "page": "background.html"
  },
  "browser_action": {
    "default_title": "Copy Clean Page URL",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png"
    }
  },
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "clean-link-addon@example.com",
      "strict_min_version": "78.0"
    }
  }
}