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
I'm talking about the tab reload issue. Check my reply to other comment. Where I link issues. Basically you cannot fill forms, multi task or do stuff without the tab reloading on you. This issue has been ongoing since 2020. I changed phones but this issue did not change once. Permalink to that comment: https://lemmy.ml/comment/2013238