Examine source code of Toolszu PDF Converter

{
  "manifest_version": 3,
  "name": "Toolszu PDF Tools",
  "description": "Fast • Free • 31+ PDF Converter Tools by Toolszu.com",
  "version": "1.0",
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "128": "icons/toolszu-128.png"
    }
  },
  "icons": {
    "16": "icons/toolszu-16.png",
    "48": "icons/toolszu-48.png",
    "128": "icons/toolszu-128.png"
  },
  "permissions": [
    "activeTab"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "toolszu-addon@toolszu.com",
      "strict_min_version": "109.0"
    }
  }
}