Something landed on the latest Nightly that is causing errors on my Intel HD3000. I suspect it's either bug 1289640 or bug 1284672. about:support Features Compositing Direct3D 9 Asynchronous Pan/Zoom wheel input enabled; touch input enabled WebGL Renderer Google Inc. -- ANGLE (Intel(R) HD Graphics 3000 Direct3D9Ex vs_3_0 ps_3_0) WebGL2 Renderer WebGL creation failed: * Refused to create native OpenGL context because of blacklist entry: WEBGL_NATIVE_GL_OLD_INTEL * Exhausted GL driver options. Hardware H264 Decoding No; Hardware video decoding disabled or blacklisted Audio Backend wasapi DirectWrite false (6.2.9200.17568) GPU #1 Active Yes Description Intel(R) HD Graphics 3000 Vendor ID 0x8086 Device ID 0x0116 Driver Version 9.17.10.4229 Driver Date 5-26-2015 Drivers igdumd64 igd10umd64 igd10umd64 igdumd32 igd10umd32 igd10umd32 Subsys ID 00000000 RAM Unknown Diagnostics AzureCanvasAccelerated 0 AzureCanvasBackend skia AzureContentBackend cairo AzureFallbackCanvasBackend cairo failures [GFX1-]: VendorIDMismatch V 0x8086 0 Decision Log DIRECT2D failed by runtime: Direct3D11 device does not support texture sharing D3D11_HW_ANGLE broken by runtime: RenderTargetViews need recreating Failure Log (#0) Error VendorIDMismatch V 0x8086 0 (#1) Error [D3D11] create component blender failed: 0x80070057, 0 (#2) Error [D3D11] create component blender failed: 0x80070057, 0 (#3) Error [D3D11] create component blender failed: 0x80070057, 0

Which acceleration are you referring to? You're getting D3D9 layers. What did about:support look like on the previous Nightly?

On Firefox 49b1 I get (I think it's exactly the same thing as previous Nightly, except for APZ): Recursos Composição Direct3D 11 Deslocamento/Zoom assíncrono nenhum Renderização WebGL Google Inc. -- ANGLE (Intel(R) HD Graphics 3000 Direct3D11 vs_4_1 ps_4_1) Descodificação H264 por hardware Yes; Using D3D9 API Direct2D true DirectWrite true (6.2.9200.17568) GPU #1 Ativo Sim Descrição Intel(R) HD Graphics 3000 ID do fornecedor 0x8086 ID do dispositivo 0x0116 Versão do driver 9.17.10.4229 Data do driver 5-26-2015 Drivers igdumd64 igd10umd64 igd10umd64 igdumd32 igd10umd32 igd10umd32 ID do subsistema 00000000 RAM Unknown Diagnósticos AzureCanvasAccelerated 0 AzureCanvasBackend direct2d 1.1 AzureContentBackend direct2d 1.1 AzureFallbackCanvasBackend cairo

Let's duplicate this to bug #1292498 per regression range and more information,