Examine source code of Web to PDF

{
  "manifest_version": 3,
  "name": "Web to PDF",
  "version": "2.0.2",
  "description": "Export any web page as a clean PDF — choose paper size, extract articles, force light mode, or save just your selection.",
  "permissions": [
    "activeTab",
    "scripting",
    "tabs",
    "downloads",
    "contextMenus"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "web-to-pdf@edmmaboat00",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  },
  "action": {
    "default_title": "Save page as PDF",
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "commands": {
    "save-pdf": {
      "suggested_key": {
        "default": "Alt+Shift+P"
      },
      "description": "Save current page as PDF"
    }
  }
}