Gonna need some statistics on this, because your anecdotal experience is not at all like mine. FF is totally useable on Android.
Ditto, I barely noticed the switch.
The only inconvenience is that it doesn’t prefill my credit card details, which is probably a good thing from both a security and hip pocket angle anyway
I have used Firefox on many smartphones since 2014. It’s not an anecdotal experience of mine. It’s the difference between chromium based browsers on android being more efficient compared to Firefox. Here’s the github issue which was open from 2020, now moved to Bugzilla: https://github.com/mozilla-mobile/fenix/issues/12731#event-8105829420
If this did not happen it would not have been kept open for so long. Just search tab reload in closed issues you will people still complaining while the repo was accessible.
Bugzilla issue from 2 years ago: https://bugzilla.mozilla.org/show_bug.cgi?id=1752594
The migrated issue from github: https://bugzilla.mozilla.org/show_bug.cgi?id=1807364