There is still Qt WebEngine as a "lite" Electron. Or if that is too objectionable you can use the WebView interface with a users browser and let the app run as a background process.
Electron (while inside Atom) started out its life as a WebView from WebKit.framework, but they realized there are too many downsides to that. So they forked Chromium to add it to a Node process and wired it into Node's libuv, which is all Electron really is. So yes it's heavier weight, but now you have Developer Tools built in.