I notice the problem when I test Bug 1151306. I am not sure that this is related to the cause of Bug 1151306. The flickering seems do not occur without e10s. Steps To Reproduce: 1. Clear cache and cookies if any 2. Open http://www.n2yo.com/?s=38348|25544 --- observe Flash ads at the bottom of page (if the ads hides, You moving the mouse pointer over the ad title. Then the ads reappears) Actual Results: The Flash ads may flicker few times at the start. And, The Flash ads is continuously flickering every map update Expected Results: The Flash ads may flicker few times at the start. Regression pushlog: https://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=a4ac07b1a28b&tochange=0f1095c9567f Triggered by: 0f1095c9567f Mason Chang — Bug 1144317 - Enable vsync refresh driver on Windows. r=kats However, after that, the ads should not flicker.

Graphics -------- Adapter Description: AMD Radeon HD 6450 Adapter Drivers: aticfx64 aticfx64 aticfx64 aticfx32 aticfx32 aticfx32 atiumd64 atidxx64 atidxx64 atiumdag atidxx32 atidxx32 atiumdva atiumd6a atitmm64 Adapter RAM: 1024 Asynchronous Pan/Zoom: none ClearType Parameters: Gamma: 2200 Pixel Structure: R ClearType Level: 100 Enhanced Contrast: 200 Device ID: 0x6779 Direct2D Enabled: true DirectWrite Enabled: true (6.2.9200.16571) Driver Date: 11-20-2014 Driver Version: 14.501.1003.0 GPU #2 Active: false GPU Accelerated Windows: 2/2 Direct3D 11 (OMTC) Subsys ID: 23111787 Vendor ID: 0x1002 WebGL Renderer: Google Inc. -- ANGLE (AMD Radeon HD 6450 Direct3D11 vs_5_0 ps_5_0) windowLayerManagerRemote: true AzureCanvasBackend: direct2d 1.1 AzureContentBackend: direct2d 1.1 AzureFallbackCanvasBackend: cairo AzureSkiaAccelerated: 0

Alice0775, Can you reproduce with e10s off? If not, can you reproduce in e10s with all of your add-ons disabled? If so, can you narrow down which addon(s) are involved? Thanks.

(In reply to [:tracy] Tracy Walker - QA Mentor from comment #2) > Alice0775, > > Can you reproduce with e10s off? If not, can you reproduce in e10s with all > of your add-ons disabled? If so, can you narrow down which addon(s) are > involved? > > Thanks. As I said in comment #0, The problem does not happen without e10s. This happens only with e10s. No addon installed. I just tested with newly created profile.

I also encountered this issue: I opened two windows and played a Flash youtube video in both windows. The result can be seen in the gif attached. If I open another tab in each window and focus one of the new opened tabs, image will not flicker anymore. I tested using latest Nightly 40.0a1 on Windows 8.1 64-bit Graphics Adapter Description AMD Radeon HD 6450 Adapter Drivers aticfx64 aticfx64 aticfx64 aticfx32 aticfx32 aticfx32 atiumd64 atidxx64 atidxx64 atiumdag atidxx32 atidxx32 atiumdva atiumd6a atitmm64 Adapter RAM 1024 Asynchronous Pan/Zoom none Device ID 0x6779 Direct2D Enabled true DirectWrite Enabled true (6.3.9600.17415) Driver Date 11-20-2014 Driver Version 14.501.1003.0 GPU #2 Active false GPU Accelerated Windows 1/1 Direct3D 11 (OMTC) Subsys ID 21251462 Vendor ID 0x1002 WebGL Renderer Google Inc. -- ANGLE (AMD Radeon HD 6450 Direct3D11 vs_5_0 ps_5_0) windowLayerManagerRemote true AzureCanvasBackend direct2d 1.1 AzureContentBackend direct2d 1.1 AzureFallbackCanvasBackend cairo AzureSkiaAccelerated 0

(In reply to Bogdan Maris, QA [:bogdan_maris] from comment #4) > Created attachment 8589611 [details] > gif showing the issue > > I also encountered this issue: > > I opened two windows and played a Flash youtube video in both windows. The > result can be seen in the gif attached. If I open another tab in each window > and focus one of the new opened tabs, image will not flicker anymore. > > I tested using latest Nightly 40.0a1 on Windows 8.1 64-bit > This may be Bug 1152326, because the regresion window is different.

based on comment #4; "I opened two windows and played a Flash youtube video in both windows." This seems likely a dupe.