Maybe I'm less sensitive to that, but I hadn't really noticed on a phone that wasn't high-end in 2020 and certainly isn't now. I'll have to pay attention to sites being slow and compare a Chromium-based browser next time I notice one.

I switched from Firefox desktop to Chrome when Chrome was new because it was multi-process and one janky page couldn't hang or crash the whole browser. I vaguely remember the renderer being a little faster, but multi-process was transformative. Firefox took years to catch up with that.

I'm very sensitive to ads though. If a browser doesn't have a decent adblocker, I'm not using it. Perhaps surprisingly, the Chromium browser with good extension support on Android is Edge.