4 ms·

Same here. I have been a longtime Firefox user and don't recall having performance issues with YouTube on macbook before Quantum. But now if I'm watching anyth

Same here. I have been a longtime Firefox user and don't recall having performance issues with YouTube on macbook before Quantum. But now if I'm watching anything more than a short clip on YouTube, the MBP's fans start to annoy me and it feels like it is going to burn a hole in my lap. YouTube in Chrome is totally fine. YouTube on Firefox on my Windows Intel NUC desktop is also totally fine. It seems to be a mac only Firefox issue. Would really love a solution!

cpeterso 8y ago
Firefox uses H.264 for YouTube on macOS, so it can use the system's H.264 hardware decoder, which should be faster and use less power than a software decoder. Chrome uses a VP9 software decoder on YouTube. You can try VP9 in Firefox by setting the about:config pref "media.mediasource.webm.enabled" = true, but it is disabled by default for good reasons. :) This YouTube page will show which codecs are currently enabled in your browser: https://www.youtube.com/html5 https://www.youtube.com/html5