Firefox 85.0.1 Ubuntu 20.04 suddenly just blank no pages render, no access to preferences nothing except the menu bar - I have tried starting in safe mode, refreshing firefox, deleting profile info, starting a different portable version of firefox 78.3.0 also blank. There is a message when started from the command line about multiple gpu's detected (there are 2 nvidia gpu's one of which is passed through to a guest kvm) Other browsers work fine on the system and firefox worked fine until recently other than stopping using firefox on this machine which I would rather not do I seem to be out of options (note firefox works fine in the guest kvm's) [GFX1-]: More than 1 GPU from same vendor detected via PCI, cannot deduce device [GFX1-]: More than 2 GPUs detected via PCI, secondary GPU is arbitrary