AFAIK, Focus is FOSS. If that’s correct, can you confirm that your issue is:
- Builds aren’t released on F-Droid, and you don’t want to use the Play Store. Would FFUpdater fit your purpose?
- You want an alternate to Firefox Focus which is also FOSS. Could you let us know what deficiencies an alternate would correct?
- Something else?
Ah, that makes sense. Were you using Obtainium or just manually grabbing updates manually? FFUpdater can help you keep up to date, and here’s the folder of released apks. I know this messes with you workflow, but IMHO, it’s probably better to keep with the browser you like. However, if you decide to try an alternative, all the best of luck!