[gtklocker]

This is making me really curious because while Chrome is buttery smooth on my Macbook Pro, Firefox 57 is really sluggish, especially when creating/closing tabs. You can literally see the animation stuttering. Other times when a page loads it won't paint for some seconds even if it appears that it has completed loading. Is anyone else having these issues?

[rene_bg]

I have some similar issues. Sometimes Firefox lags after loading the page (around 1 sec), but eventually works fluently afterwards. It feels like it needs to warm up the engine.

I noticed that disabling "smooth scrolling" in the settings helps with initial scrolling issues.

However, in general I have the feeling that FF57 is faster than before. Could also be that I now focus on the loading times more than usual. A restart of Firefox helped yesterday after the upgrade to 57.

I have a MacBook Pro 2015 and am Firefox user since 1.0 ;-)