this post was submitted on 07 Feb 2025
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Technology
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uBlock Origin + Firefox
Lately, Firefox + uBlock Origin and YouTube on Linux is sometimes horribly slow for me. It uses all the CPU and chokes my computers. Sometimes it's even difficult to just seek in the video, as it's so sluggish.
It seems to vary depending on the type of ads. It's not "random" because a video that has this behavior will always do it, even if I restart FF, while others will be fine.
I thought it was my old computer at first, or that I was out of memory, but the same thing happens on my modern Ryzen.
Although I notice it less and less, so maybe it was a bug with YT + uBlock.
And it's only on my Linux computers. On Android, FF + uBlock works super well.
Just a shot in the dark here, but do you have ambient mode enabled? (that annoying glow light around the video). I've read from various people that it can use an insane amount of cpu on some devices. Disabling it fixed the performance issues they faced.