give nighlty I try on my second old phone were Firefox was not usable is now working quite well (for the old hardware snapdragon 660 and 4 giga of ram )the only sad part is opening or focusing url bar (which still show home )is painfully laggy and slow

yandex Browser which also support every Chrome desktop extensions(looking at you ublock ...) on Android has this feature glad to hear I'm not the only one I use it.

I too wanted the same just write a small UserScript or just a ublock scriplet to modify viewport : function addViewport() { var metaTag = document.createElement('meta'); metaTag.name = "viewport"; metaTag.content = "width=device-width, initial-scale=0.45, maximum-scale=0.8, user-scalable=1"; document.querySelector('head').appendChild(metaTag); } document.addEventListener('DOMContentLoaded', function () { addViewport(); });

unfortunately dark reader makes Firefox too slow let's use stylus or https://github.com/...

it's not a bug (I'm a long time user and I compile fenix from source )a few about:pref are "locked " like ipc.processcount

happened to me too more than twice ...