https://bugzilla.mozilla.org/show_bug.cgi?id=1429522#c45 Linked in the Twitter thread.

It's in the link. The decreases in power usage put it on par with Chrome.

So, still terrible then?

The reason I use Safari is because Chrome is unbelievably power-hungry. I didn't know Firefox was even worse.

Yes, compared to Safari. The Safari engineering is very impressive! I think there is quite a bit more to come on the Firefox side though, so hopefully they'll close the gap.

Same, I switched to Safari a couple of years ago. I was initially hesitant, because I used the developer tools in Chrome quite a bit. I was pleasantly surprised to see that the Safari developer tools is very mature, and in some ways better than Chrome.