Created attachment 574689 [details] [diff] [review] Expose properties in about:support Bug 651981 adds an API to register custom properties with GfxInfo, we should expose these via about:support.
Mozilla/5.0 (X11; Linux i686; rv:11.0a1) Gecko/20111118 Firefox/11.0a1 Is this bug Mac only as the OS field indicates? On Linux all I see is: Graphics Adapter Description NVIDIA Corporation -- GeForce 8400 GS/PCI SSE2Driver Version3.3.0 NVIDIA 280.13 WebGL Renderer NVIDIA Corporation -- GeForce 8400 GS/PCI/SSE2 -- 3.3.0 NVIDIA 280.13 GPU Accelerated Windows 0/1 which gives no indication of why GPU Accelerated Windows is 0/1.
That is true for me too (with ATI card), but I am not sure it belong into this bug.
Actually I know, layers (accelerated windows) are not enabled on Linux for any cards (can be forced with about:config pref). But it should be written in about:support. I think there is infrastructure for showing "feature not supported on this OS".