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this post was submitted on 11 Sep 2026
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The problem is not the missing
getPreferredCanvasFormat(), but that a field namednavigator.gpuis undefined/not set. That might be because of the disabled webgpu in your settings?Yeah, I figured.
So a clean install of Firefox on an Intel Mac should technically be fine. I guess Mozilla turned it off for abuses like this.
Thank you for your input.
YouTube on Firefox was very crappy on Linux (bazzite). I had to disable hardware acceleration a few years ago to have videos properly render colors. I just remembered recently since I reinstalled my browser and the problem came back. Any chance you might have disabled that at some point as well on your Mac for some reason ?
I don't think so. I use Firefox Developer Edition as my default browser. It is possible that I disabled those flags at some point but I would think it would reset after a clean install and not being logged in to Sync.