I switched because CPU usage on Mac OS was so much higher under Firefox than Chrome. I tried so many different things, following suggestions in Bugzilla, HN comments and just about every site I could find through DDG and Google. Nothing worked, and usually when I bring it up people dismiss the complaint with "it's better than it used to be", "it's not that bad" or "it's just you". But I'm not the only person complaining (or being dismissed outright).
To be clear, it's not pegging any core at 100% or anything so extreme. But it causes my laptop to heat up and my fans to kick in very frequently - something that almost never happens with Chromium/Webkit/Blink based browsers. If I primarily used a desktop, I wouldn't even have noticed, but a warm lap and constant fan noise makes it unusable for me.
Safari was out because I needed to run multiple browser profiles concurrently (something Firefox and Chrome support readily).
I've recently switched from Mac OS to Windows but my experience (as recently as a month ago) with Firefox leaves me feeling that it's the less mature implementation with an over zealous fan base ("it's not us, it's you!").
To be clear, it's not pegging any core at 100% or anything so extreme. But it causes my laptop to heat up and my fans to kick in very frequently - something that almost never happens with Chromium/Webkit/Blink based browsers. If I primarily used a desktop, I wouldn't even have noticed, but a warm lap and constant fan noise makes it unusable for me.
Safari was out because I needed to run multiple browser profiles concurrently (something Firefox and Chrome support readily).
I've recently switched from Mac OS to Windows but my experience (as recently as a month ago) with Firefox leaves me feeling that it's the less mature implementation with an over zealous fan base ("it's not us, it's you!").