Have you considered using a PWA to create a Chrome extension?
Sam Thorogood writes on Dev.to:
So you’ve built a PWA, created your service worker, and followed all the guides. In my case, that is Emojityper: a simple PWA where you can enter words, and receive emoji. This is perfect for desktop and entering emoji in editors that don’t support them.
But once you’ve built this great experience, you’re not limited to distributing it only on “the web”. In this post, I’m going to detail how I shipped Emojityper as a Chrome extension, accessible via a browser action.