Earlier quoted context omitted.
Every time I use Firefox I find some other stupid issue that just doesn't fly in 2021. Today it might be a top 50 website that doesn't work properly, yesterday maybe it's excessive cpu usage, day before maybe pinch to zoom doesn't work. Who knows what dumb crap is happening tomorrow. Life is too short to muck around with half baked software.
Firefox is a dumpster fire half the time. I use Firefox still for exactly ONE website: Facebook. To keep it sandboxed. I still have to restart Firefox at least once every other day because it leaks and becomes a runaway process. No plugins/addons. As stock as it gets. One single website only... and it still pukes all over itself.
Because I have firefox instances running for months with tremendous amounts of tabs open on 8GB of RAM laptop and has absolutely zero problem with it.