[mosselman]

My work laptop is a very fast upper end macbook and I can somewhat reliably run Firefox on that. My personal laptop is an older macbook pro retina model and whenever I use firefox on that it gets incredibly slow and from time to time the computer just freezes for 20-40 seconds. So, sadly, I can't use firefox on that.

At one point someone on HN posted a link to the bug report on mozilla's bug tracker about this issue with retina macbooks. Does anyone have that link? I can't find it.

[arusahni]

Is this it? https://bugzilla.mozilla.org/show_bug.cgi?id=1404042

[mosselman]

Yes that seems to be it! Thank you. Always good to not be alone when experiencing such problems.

[isostatic]

I've got a bottom of the line 2013 macbook air. I closed everything down earlier to update to mojave, and firefox told me it would close 7 windows and 71 tabs. Never had a problem with it.

My main desktop is an ubuntu 16.04 machine with 16GB of memory and I've never had a slowdown, often get upto the 100+ tab range across different windows.

[mosselman]

The MacBook Air doesn’t have a retina screen, it appears to be related to that. I also use ff on Ubuntu without issues.

[anthony_doan]

I'm currently surfing on a "MacBook Pro (Retina, 15-inch, Late 2013)". It works fine with 4 window opened (1 private, 2 with ~20 tabs, main one with at least 50 tabs).

I'm also running 10+ extensions.

Works pretty well for me.

Sometime after awhile the video playback goes wonky though. I end up doing `sudo killall firefox`.

[thinkingemote]

I have an old Thinkpad X220 and i see no slowdown with Firefox, but I do see more CPU usage in my cpu graphs compared with Chromium so I worry when I am on battery power. I'm not sure how to properly compare CPU usage to determine if I am just imagining it.

[mistertrotsky]

I use Firefox Nightly on a MacBook (Retina) and it performs very well with WebRender on and gfx.compositor.glcontext.opaque set to TRUE. Faster than Safari even! Worse battery life though.