This bug was filed from the Socorro interface and is report bp-7f4fad25-0a6f-4d1c-991a-7287f2140214. ============================================================= STR 1. set layers.offmainthreadcomposition.enabled = true 2. Restart browser

Regression window(m-i) Good: https://hg.mozilla.org/integration/mozilla-inbound/rev/b2dd850b0ca3 Mozilla/5.0 (Windows NT 6.3; WOW64; rv:30.0) Gecko/20100101 Firefox/30.0 ID:20140213082025 Bad: https://hg.mozilla.org/integration/mozilla-inbound/rev/f78468f352e4 Mozilla/5.0 (Windows NT 6.3; WOW64; rv:30.0) Gecko/20100101 Firefox/30.0 ID:20140213085548 Pushlog: http://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=b2dd850b0ca3&tochange=f78468f352e4 Triggered by: f78468f352e4 Bill McCloskey — Bug 963952 - [e10s] Don't use basic compositor when using D3D11 compositor (r=mattwoodrow) Graphics -------- Adapter Description: VMware SVGA 3D Adapter Drivers: vm3dum64 vm3dum vm3dgl64 vm3dgl Adapter RAM: 128 Device ID: 0x0405 Direct2D Enabled: Blocked for your graphics card because of unresolved driver issues. DirectWrite Enabled: false (6.3.9600.16384) Driver Date: 7-12-2013 Driver Version: 7.14.1.5025 GPU #2 Active: false GPU Accelerated Windows: 0/1 Basic Blocked for your graphics card because of unresolved driver issues. Vendor ID: 0x15ad WebGL Renderer: Blocked for your graphics card because of unresolved driver issues. windowLayerManagerRemote: false AzureCanvasBackend: skia AzureContentBackend: cairo AzureFallbackCanvasBackend: cairo AzureSkiaAccelerated: 0

Fixed by backed out Bug 963952. https://hg.mozilla.org/integration/mozilla-inbound/rev/b2fc3f9509b0 Mozilla/5.0 (Windows NT 6.3; WOW64; rv:30.0) Gecko/20100101 Firefox/30.0 ID:20140214133650

This might be a dupe of bug 972891 but I'm not sure given the different platform. For now we kept bug 972891 open to check why specifically we had this crash. Please check the other bug in what steps to do to get the necessary information why we were crashing.

Actually closing as dupe.