Steps to reproduce: 1. Set 'layers.offmainthreadcomposition.enabled' = true and restart 2. Open http://www.fishgl.com/ 3. Wait 100% Actual results: Sound is OK. However, Nothing is drawn except a side panel. Expected results: Animation should be drawn Application Basics ------------------ Name: Firefox Version: 32.0a1 User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:32.0) Gecko/20100101 Firefox/32.0 Crash Reports for the Last 3 Days --------------------------------- All Crash Reports Extensions ---------- Graphics -------- Adapter Description: ATI Radeon HD 4300/4500 Series Adapter Drivers: aticfx64 aticfx64 aticfx32 aticfx32 atiumd64 atidxx64 atiumdag atidxx32 atiumdva atiumd6a atitmm64 Adapter RAM: 512 ClearType Parameters: Gamma: 2200 Pixel Structure: R ClearType Level: 100 Enhanced Contrast: 50 Device ID: 0x954f Direct2D Enabled: true DirectWrite Enabled: true (6.1.7601.18245) Driver Date: 4-29-2013 Driver Version: 8.970.100.1100 GPU #2 Active: false GPU Accelerated Windows: 1/1 Direct3D 11 (OMTC) Vendor ID: 0x1002 WebGL Renderer: Google Inc. -- ANGLE (ATI Radeon HD 4300/4500 Series Direct3D9Ex vs_3_0 ps_3_0) windowLayerManagerRemote: true AzureCanvasBackend: direct2d AzureContentBackend: direct2d AzureFallbackCanvasBackend: cairo AzureSkiaAccelerated: 0 Regression window(m-c) Good: https://hg.mozilla.org/mozilla-central/rev/734e0f2b5083 Mozilla/5.0 (Windows NT 6.1; WOW64; rv:31.0) Gecko/20100101 Firefox/31.0 ID:20140401133123 Bad: https://hg.mozilla.org/mozilla-central/rev/0ff6afce0133 Mozilla/5.0 (Windows NT 6.1; WOW64; rv:31.0) Gecko/20100101 Firefox/31.0 ID:20140401134524 Pushlog; http://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=734e0f2b5083&tochange=0ff6afce0133 Regression window(m-i) Good: https://hg.mozilla.org/integration/mozilla-inbound/rev/5f286e259379 Mozilla/5.0 (Windows NT 6.1; WOW64; rv:31.0) Gecko/20100101 Firefox/31.0 ID:20140401004332 Bad: https://hg.mozilla.org/integration/mozilla-inbound/rev/d1f8ac35bdd4 Mozilla/5.0 (Windows NT 6.1; WOW64; rv:31.0) Gecko/20100101 Firefox/31.0 ID:20140401005432 Pushlog; http://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=5f286e259379&tochange=d1f8ac35bdd4 In local build, Last Good: 5f286e259379 First Bad: e915878751ba Regressed by: e915878751ba Matt Woodrow — Bug 990338 - Use Moz2D for updating CanvasClient. r=nical Maybe duplication of Bug 995947