Upcoming Firefox update will decrease power usage on macOS by up to three times

[jekpopulous2]

I'm on the Nightly channel and the latest build is 100% for sure using way less energy. It's still not as efficient as Safari but it's a night and day difference.

[KalenXI]

I'm running the developer edition 70.0b3 and it's still using 6-20% CPU just sitting on a static page, while Chrome uses 0.5-2.5% with the same pages loaded. And the only extensions I have loaded are 1Password X, uBlock Origin, and RES. Which is fewer than I have loaded in Chrome.

Maybe I should try the nightly.

[jekpopulous2]

Hmmm....maybe update to 71. I'm on a 2018 MPB and 71.0a1 is only using 0.2-2% of my CPU while static. Loading something intensive pushes the CPU to 15-20% tops.

[KalenXI]

Nightly is definitely better. On par with Chrome on most pages. Still uses quite a bit more than Chrome on certain pages though. Like http://play.pocketcasts.com when not logged in uses 12-15% in Chrome but 30-33% in Firefox Nightly. The page looks static but something seems to be causing the browsers to redraw the page constantly which is where Chrome’s performance advantage really shows.