I'll reinstall now for a fresh opinion vs Kiwi (which to me is Chrome with Extensions minus tab groups or AI junk)
My last installs of Firefox Klar and Developer had the APKs at over 200 MB, no ability to block sound per-site, confusing UI icons (e.g. I couldn't find the forward button after clicking back, abstract shapes for everything), reader mode that doesn't place you at the same place where you were on the original page, annoying gestures that can't be disabled (swiping tabs away UGGGHHHH), Collections which were really quite silly/not my thing, no toolbar customizability like in the desktop app, no WebHID, data collection on by default.
Mozilla could join Canonical in dumping the Nickelodeon color scheme. (Did the founders of all these plus FedEx go to Clemson or something??)
Now Firefox is under 100 MB, has very much bought into Android's overrounded/inproperly-whitespaced/shadow-heavy/unintuitively-animated Material 3 Expressive. Like most Material Design apps, this Firefox is ugly in a way that offers zero usability benefit. Despite the excessive margins nearly everywhere, the three dot menu is still too close to the screen edge. Holding a tab selects its checkbox, holding it longer does "something" but it's not clear what, I guess "show full URL" and then eventually "Share"? I still have to change just about every default setting to match my personal preferences.
The "swipe tab away" gesture is still there. WebHID will never be added. Per-tab disabling of Sound is still missing; this is not the same as Autoplay! There are prominent features that I'd never use :private mode icon, "grab tabs from any device", "search your tabs", the giant "FIREFOX IS ON GUARD" reminder, a home screen.
New Tab is across the entire screen from the tab overview button, so you either need to enable the New Tab shortcut (which encroaches on URL space) or just live with "tap top-right, tap bottom-right" for every new tab you'll create in your lifetime which is DEFINITELY not nice for one-handed navigation. There was enough space in the tab overview top bar for a "New Tab" button, but then they'd have to ditch the default Jetpack Compose floating action button.
Oh, and I guess there's no about:config unless you re-enable it at chrome://geckoview/content/config.xhtml. :(
I liken Firefox to mediocre toilet paper. It gets its job done but can get irritating to use day after day.