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I have an Optimus laptop with an Intel iGPU and an Nvidia dGPU, and just noticed that when using the Nvidia GPU (activated with prime-select nvidia), WebGL-based games run software-rendered on the Firefox browser, with the noticeable performance problems one can imagine.

The Nvidia driver is properly loaded, I can play “standard” (i.e. non-browser) games correctly, but everything inside Firefox is software-rendered. about:support indeed shows two GPUs, GPU1 being llvmpipe (LLVM 15.0.7, 256 bits), and GPU2, marked inactive, being my Intel dGPU (vendor/device being 0x8086/0x9bc4).

When I use the Intel GPU only (prime-select intel), hardware acceleration works properly for WebGL games on Firefox.

I use the latest 535 Nvidia driver, with X11, not Wayland, on 23.04 (lunar).

Any suggestions on what I should do to have Firefox detect my Nvidia GPU as it does with Intel Graphics ?

NovHak
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2 Answers2

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I was trying to turn on hardware video acceleration in Firefox with Nvidia GPU and proprietary driver here. Not sure if this is your case, but may help.

Elven
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For me I need to manually compile and install nvidia-vappi-driver and use apt version of Firefox (not Snap)

Firefox with Nvidia GPU about:support

brokedude2901
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