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Firefox performance has improved a lot on my 2019 MBP over the past year or so. For video streaming, it doesn't seem to be much worse than Chrome. One of the r
by celsoazevedo 5y ago
Firefox performance has improved a lot on my 2019 MBP over the past year or so. For video streaming, it doesn't seem to be much worse than Chrome.
One of the reasons why Firefox and Chrome use more power than Safari for video streaming is that they support modern/open video codecs that don't have hardware decoding on Macs. For example, YouTube has been using VP9 for years. Until Catalina, Safari would load a h.264 video (that's why Safari used to be limited to 1080p) which has hardware decoding, while Chrome and Firefox would load a VP9 video at higher resolutions and use software decoding, using way more power than Safari. Now YouTube is starting to use AV1 and again, Chrome and Firefox supports it, but Safari doesn't.