cef/libcef/common/extensions/api/browser_manifest_overlay.json

{
  "name": "content_browser",
  "display_name": "CEF",
  "interface_provider_specs": {
    "navigation:frame": {
      "provides": {
        "renderer": [
          "extensions::KeepAlive",
          "extensions::mime_handler::MimeHandlerService"
        ]
      }
    }
  }
}