WebRender crashes and switches to Software rendering

[adarshahd]

Preliminary Checks

• I have read and understood the important section above.
• I have searched existing issues and avoided creating duplicates.
• I am not filing an enhancement request.
• I have checked that this issue cannot be reproduced on Mozilla Firefox.
• I have checked that this issue can be reproduced once I removed all my Mods and Custom CSS.

What happened?

Dear team, thank you for a great browser first of all.

Using the browser for sometime, the webrender crashes and switches to software. And the browser becomes unusable. No particular flow, but it is reproducible when opening and playing YouTube videos.

System Info
Lenovo Thinkpad

Fedora 43 beta
Kernel: Linux 6.17.0-0.rc6.49.fc43.x86_64
CPU: AMD Ryzen 5 PRO 4650U (12) @ 2.10 GHz
GPU: AMD Radeon Vega Series / Radeon Vega Mobile Series [Integrated]

Driver
Driver Vendor mesa/radeonsi
Driver Version 25.2.2.0

Relevent Log
zen_browser.log.txt

Please let me know if more info required

Expected behavior

Webrender should not crash

Actual behavior

Webrender crashing

Steps to reproduce

1. Open browser
2. Navigate pages for sometime
3. Open youtube
4. Open any video in a private window

Screenshots and videos

Version

1.15.5b (Firefox 142.0.1) (64-bit)

What platform are you seeing the problem on?

Linux (Tarball)

What component is this issue related to?

Performance

Relevant log output if applicable

Already attached

[adarshahd]

FYI, This seems to be upstream Firefox issue also. Related to mesa

https://bugzilla.mozilla.org/show_bug.cgi?id=1986254
https://gitlab.freedesktop.org/mesa/mesa/-/issues/13877

As a workaround, Vulkan is doing magic in my case. I can see some amount of snappiness too.

MESA_LOADER_DRIVER_OVERRIDE=zink zen-browser

[Propheticus]

I see there's a MESA update to 25.2.3 that does mention "ARB_vertex_program and ARB_fragment_program are broken" under its bugfixes.
Not into this content, so unsure of its relevance but might be worth a try?

[adarshahd]

Seems to have been fixed with 1.16b. At least when I am not connected to external monitor, no issues so far (without workaround suggested above). Will verify once I connect to external monitor (Once back home) and confirm

Edit: Doesn't work ! Crash started again. So I would have to apply the workaround again

[Klusio19]

FYI, This seems to be upstream Firefox issue also. Related to mesa

https://bugzilla.mozilla.org/show_bug.cgi?id=1986254 https://gitlab.freedesktop.org/mesa/mesa/-/issues/13877

As a workaround, Vulkan is doing magic in my case. I can see some amount of snappiness too.

MESA_LOADER_DRIVER_OVERRIDE=zink zen-browser

This workaround doesn't work for me with Nvidia GTX 1660 Ti Mobile on Fedora 42.
Also #10555