Tab progress throbber flickers and is not drawn properly on Windows7 Classic. Steps To Reproduce: 1. Disable HWA from option 2. Open web pages Actual Results: Tab progress throbber is broken Expected Results: Tab progress throbber should be drawn properly. 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 DirectWrite Enabled: false (6.1.7601.18245) Driver Date: 4-29-2013 Driver Version: 8.970.100.1100 GPU #2 Active: false GPU Accelerated Windows: 0/1 Basic (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: skia AzureContentBackend: cairo AzureFallbackCanvasBackend: cairo AzureSkiaAccelerated: 0 Regression window(fx) Good: https://hg.mozilla.org/integration/fx-team/rev/138fa90154ec Mozilla/5.0 (Windows NT 6.1; WOW64; rv:32.0) Gecko/20100101 Firefox/32.0 ID:20140521143920 Bad: https://hg.mozilla.org/integration/fx-team/rev/84c572a9c878 Mozilla/5.0 (Windows NT 6.1; WOW64; rv:32.0) Gecko/20100101 Firefox/32.0 ID:20140521150816 Pushlog: http://hg.mozilla.org/integration/fx-team/pushloghtml?fromchange=138fa90154ec&tochange=84c572a9c878 Regressed by: a9329165ace3 Jared Wein — Bug 759252 - Use CSS animations for the connecting and progress throbbers. r=fryn, r=Dao layers.offmainthreadcomposition.enabled = false fixes the problem

Regression window(m-i) Good: https://hg.mozilla.org/integration/mozilla-inbound/rev/bb8fc1380b00 Mozilla/5.0 (Windows NT 6.1; WOW64; rv:32.0) Gecko/20100101 Firefox/32.0 ID:20140519202628 Bad: https://hg.mozilla.org/integration/mozilla-inbound/rev/46d9ffb97fe3 Mozilla/5.0 (Windows NT 6.1; WOW64; rv:32.0) Gecko/20100101 Firefox/32.0 ID:20140519224628 Pushlog: http://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=bb8fc1380b00&tochange=46d9ffb97fe3 Suspected: 46d9ffb97fe3 Bas Schouten — Bug 899785: Switch on OMTC and async video on windows. r=BenWa

This was fixed by Bug 1013769 https://hg.mozilla.org/integration/mozilla-inbound/rev/2e2bc0ea5e79 Mozilla/5.0 (Windows NT 6.1; WOW64; rv:32.0) Gecko/20100101 Firefox/32.0 ID:20140527182252