[benibela]

>High CPU usage

I have that problem all the time in Firefox

But probably I just opened too many tabs

[buo]

I'd suggest the Auto Tab Discard extension. It's wonderful.

[TheGoddessInari]

I tend to open multiple thousands of tabs because Firefox lets me, and it hasn't been a cpu issue on desktop or Android.

[CRConrad]

Eats battery like Hell on my Android phone.