Examine source code of Stop loading website

{
  "manifest_version": 3,
  "name": "Stop loading website",
  "version": "1.4.7",
  "description": "Stop loading the site from the specified list of sites in the extension settings. The extension works based on how the browser's stop button works.",
  "icons": {
    "512": "icon512x512.png"
  },
  "permissions": [
    "activeTab",
    "storage"
  ],
  "content_scripts": [
    {
      "js": [
        "script.js"
      ],
      "matches": [
        "<all_urls>",
        "*://*/*"
      ],
      "run_at": "document_start",
      "all_frames": false
    }
  ],
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "action": {
    "default_popup": "options.html",
    "default_icon": {
      "512": "icon512x512.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "stoploadingwebsite@example.org"
    }
  }
}