All websites very janky vs Firefox.

[luv2code]

I'm on Pop OS 22.04 (Nvidia) with the cinnamon desktop manager, and zen is very janky/low framerate on all websites and even the config pages. I think it's because it's using the software webrender. In about:support, the compositing line says WebRender (Software) and on firefox (which is smooth) it just says WebRender.

I'd like to switch to the GPU accelerated webrender; but no setting I apply seems to affect it.

I've tried unchecking "Use Default performance" and checking "use hardware acceleration when available" in about:preferences.

I've also tried changing the following in about:config:

• gfx.webrender.all = true
• gfx.webrender.compositor = true
• gfx.webrender.software.d3d11 = false
• gfx.webrender.software.opengl = true
• layers.acceleration.force-enabled = true

None of these things changes the compositing to WebRender or gets rid of the low framerate jankiness.

Any advice for me?

Edit: I tested in Pop Shell (gnome based but still uses x-server) and it uses GPU WebRender. So it's something to do with running in Cinnamon.

[luv2code]

I guess I'm dumb. PopOS adds the context menu item to the application menu that says "Run with NVIDIA GPU" and I was launching zen with that; but not firefox. I also didn't use that menu option when I switched to Pop Shell.

Launching it normally works a lot better. It feels nice now.