Examine source code of Web2PDF

{
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_icon": {
      "64": "icons/icon19.png"
    },
    "default_title": "Blitz Web2PDF",
    "default_popup": "popup.html"
  },
  "description": "Save web pages as PDF free with one click and keep the original structure of the web pages.",
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "manifest_version": 3,
  "minimum_chrome_version": "18",
  "name": "Web2PDF",
  "permissions": [
    "storage",
    "contextMenus",
    "tabs",
    "declarativeNetRequest",
    "downloads",
    "downloads.open"
  ],
  "content_scripts": [
    {
      "js": [
        "content.js"
      ],
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "all_frames": true,
      "run_at": "document_end"
    }
  ],
  "version": "11.5",
  "browser_specific_settings": {
    "gecko": {
      "id": "{63d29c46-982a-4adc-b815-67ab8dd56ff1}",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "host_permissions": [
    "http://*/*",
    "https://*/*"
  ]
}