I just checked. Firefox on Google Play is version 101.2.0 from June 8. Fennec on F-Droid is version 97.1.1 from February 26. Maybe it's not abandoned but it doesn't feel that one can count on it for timely bug fixes.

Edit: then I remembered that F-Droid has the quirk of requiring a manual refresh of its repository. I did it and got version 101.1.0 from June 5. Much better.