Firefox: Need to set webgl.osmesalib for hwaccel on win7/64

I’m not even sure this is a bug or intentional behavior, but I haven’t found any documentation on it, so I think it’s probably a good idea to document this somewhere, and the official forum doesn’t seem like a bad place.

I also haven’t filed a bug on it yet, since I’m not even sure it is a bug so far.

I’m using Windows 7/64 and current trunk builds (at least up to 20100205) are unable to do hardware accelerated WebGL by just setting webgl.enabled_for_all_sites. Instead, you have to provide the path to the system OpenGL library via webgl.osmesalib. This could be because the opengl32.dll doesn’t reside in the system32 directory on 64bit editions of Windows … or something else, I don’t know. Setting it to the SysWOW64 folder instead fixes the issue for me (i.e. C:\Windows\SysWOW64\opengl32.dll)

Can anybody shed some light on this?

I think you can find some useful instructions to the problem of yours from … ementation