[chank]

Mostly this, performance is atrocious on a lot of sites I use.

I also dislike its history management, download management, auto-complete, search in address bar functionality, pocket integration, and much more. I'm sure if I were forced to spend more time with it I could possibly find configurations to customize all those things in a way I like, but even using it for a few days the easily findable settings weren't flexible enough.

[mentalpiracy]

I realize your comment says you’ve already switched back, but should you ever try Firefox again most of these can be tweaked directly from about:config

[chank]

I know, but not enough to my preferences at least from as far as I dug into those settings.