firefox graphics acceleration broken - missing libva

On the latest OpenBSD amd64 release, since Firefox 117 (I think), graphics acceleration has been broken and the following error messages are produced when firefox is launched:

Crash Annotation GraphicsCriticalError: |[0][GFX1-]: vaapitest: ERROR (t=0.780224) [GFX1-]: vaapitest: ERROR
Crash Annotation GraphicsCriticalError: |[0][GFX1-]: vaapitest: ERROR (t=0.780224) |[1][GFX1-]: vaapitest: VA-API test failed: libva-drm.so.2 is missing.
(t=0.780376) [GFX1-]: vaapitest: VA-API test failed: libva-drm.so.2 is missing.

Does anyone have any idea how to fix this? I haven't been able to find a package for libva nor have I been able to compile it just yet.
Thanks for any input.