There is also an interesting solution to this problem: use native WebView, so you don't have to pack the whole Chrome with your app. Basically every "electron alternative" with HTML+CSS+JS works this way.
You'll have a little bit more testing to do, as the web-views shipped by different OS might not be exactly in sync feature wise, but if your app is really simple it shouldn't be much of a problem.
https://github.com/sudhakar3697/electron-alternatives