For some reason in recent Aurora 26 GPU acceleration became enabled on my card (was blocklisted in former versions due to driver version being 6.14.10.52xx). Then I noticed clip was not working and the text flowed out of its box and overflowed surrounding content. This can be seen e.g. in the tab bar (if there are many tabs so that they are cropped, last tab title draws over the buttons on the right of the tabbar. This is output of about:troubleshooting when accel is disabled (in options). Graphics Adapter Description Mobile Intel(R) 4 Series Express Chipset Family Adapter Drivers igxprd32 Adapter RAM Unknown Device ID 0x2a42 Direct2D Enabled Blocked for your graphics driver version. DirectWrite Enabled false (0.0.0.0) Driver Date 10-21-2008 Driver Version 6.14.10.5002 GPU #2 Active false GPU Accelerated Windows 0/1 Basic Vendor ID 0x8086 windowLayerManagerRemote false AzureCanvasBackend skia AzureContentBackend none AzureFallbackCanvasBackend cairo AzureSkiaAccelerated 0

This is output when acceleration is enabled (default Firefox settings): As I said, I have not changed this setting in Firefox. I assume somebody remoed the blocklist inside FF core. Maybe that was intentional so I report this case that is still broken. I have not yet noticed any other problems so the acceleration seems to work (this is Win XP). Graphics Adapter Description Mobile Intel(R) 4 Series Express Chipset Family Adapter Drivers igxprd32 Adapter RAM Unknown Device ID 0x2a42 Direct2D Enabled Blocked for your graphics driver version. DirectWrite Enabled false (0.0.0.0) Driver Date 10-21-2008 Driver Version 6.14.10.5002 GPU #2 Active false GPU Accelerated Windows 1/1 Direct3D 9 Vendor ID 0x8086 windowLayerManagerRemote false AzureCanvasBackend skia AzureContentBackend none AzureFallbackCanvasBackend cairo AzureSkiaAccelerated 0