I'm running Ubuntu 11.10, FF 11, ATI Catalyst v12.2, Driver Package version 8.95, WebGL doesn't work.

This is a pretty capable setup and definetly did have FF work previously, Note: I've downloaded and installed the ATI drivers from AMD. Not sure how to get WebGL working.

Updated

My video card info:

01:00.0 VGA compatible controller: ATI Technologies Inc Cypress [Radeon HD 5800 Series] (prog-if 00 [VGA controller])

    Subsystem: ATI Technologies Inc Device 0b00

    Flags: bus master, fast devsel, latency 0, IRQ 44

    Memory at d0000000 (64-bit, prefetchable) [size=256M]

    Memory at fbee0000 (64-bit, non-prefetchable) [size=128K]

    I/O ports at d000 [size=256]

    Expansion ROM at fbec0000 [disabled] [size=128K]

    Capabilities: [50] Power Management version 3

    Capabilities: [58] Express Legacy Endpoint, MSI 00

    Capabilities: [a0] MSI: Enable+ Count=1/1 Maskable- 64bit+

    Capabilities: [100] Vendor Specific Information: ID=0001 Rev=1 Len=010 <?>

    Capabilities: [150] Advanced Error Reporting

    Kernel driver in use: fglrx_pci

    Kernel modules: fglrx, radeon