[jorvi]

They have in theory, but the fix isn't working for a lot of people, and Firefox continues murdering their battery. Firefox devs are aware but AFAIK their attention is focused elsewhere at the moment. Quite sad, because of all the people I got to switch to Firefox, all but one that experiences this issue has switched back to Chromium. Privacy and fighting browser hegemony is great, but stark few people are willing to sacrifice nearly half their battery life for it.