Examine source code of Pixelate Image Tool

{
  "manifest_version": 3,
  "name": "Pixelate Image Tool",
  "version": "1.0",
  "description": "Làm mờ vùng chọn trong ảnh.",
  "permissions": [
    "activeTab",
    "scripting"
  ],
  "action": {
    "default_popup": "popup/popup.html",
    "default_icon": "icons/icon.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "icons": {
    "48": "icons/icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "pixelate-image-tool@example.com"
    }
  }
}