Examine source code of The Big Gift List

{
  "name": "The Big Gift List",
  "author": "Design Lynx Ltd",
  "version": "4.6",
  "description": "Easily add items to your 'The Big Gift List' lists",
  "icons": {
    "16": "toolbar-small.png",
    "32": "toolbar-large.png"
  },
  "permissions": [
    "tabs",
    "storage"
  ],
  "host_permissions": [
    "https://www.thebiggiftlist.com/*",
    "http://*/*",
    "https://*/*"
  ],
  "manifest_version": 3,
  "action": {
    "default_title": "The Big Gift List",
    "default_icon": "toolbar-small.png",
    "default_popup": "popup.html",
    "default_area": "navbar"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "info@thebiggiftlist.com",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "authenticationInfo",
          "websiteContent"
        ]
      }
    }
  }
}