I’m using brave mixed with a network wide ad blocker, so while it’s nice that Firefox has UBO I’m fine without. Firefox has been presenting these issues every time I’ve tried switching, so for about a year now, so no not a recent issue.

This is great but I literally can’t use the base app on my S20. Like clicking on Google search hits causes the app to freeze. Trying to scroll up on a page triggers a reload 30% of the time. I want to use Firefox but it’s nowhere near good enough, and adding extensions on top of that state is not going to help.