I switched to Firefox developer edition couple weeks ago before this incident. Reason: my laptop temperature goes up to 80C+ with about 10 tabs opened in Chrome

I switched to Firefox developer edition couple weeks ago before this incident. Reason: my laptop temperature goes up to 80C+ with about 10 tabs opened in Chrome, whereas with Firefox it stays around 60C. But with this sync and cookie fiasco I am never going back, even if they fix the CPU optimization issue in a future update.