Examine source code of SmartLookup Context

{
  "manifest_version": 3,
  "name": "SmartLookup Context",
  "version": "1.0",
  "description": "Enhances contextual menus to allow quick searching of selected text across multiple search engines, dictionaries, encyclopedias, or custom user-defined websites.",
  "action": {
    "default_popup": "popup.html",
    "default_icon": "smartlookup_context.png"
  },
  "icons": {
    "128": "smartlookup_context.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "kenton4narvaezwxxd507@hotmail.com"
    }
  }
}