Browser hangs for short time/freezes: window gets white for some seconds




4 years ago
4 years ago


(Reporter: aryx, Unassigned)



39 Branch

Firefox Tracking Flags

(Not tracked)


Firefox 39.0 20150523155636 64-bit on Windows 8.1

Since the update to Firefox 39, I often see Firefox hanging for up to 10 seconds (often less than 5). The window gets white and then returns to normal.

I experienced the issue in earlier versions only if I had far more tabs open and didn't close/restart Firefox for days (but used OS hibernation).

If you don't think that it is hardware acceleration related, please move it to the appropriate component.

Philipp found in Input, no idea if it describes the same issue.

Adapter Description	Intel(R) HD Graphics 4600
Adapter Description (GPU #2)	NVIDIA GeForce GTX 765M
Adapter Drivers	igdumdim64 igd10iumd64 igd10iumd64 igdumdim32 igd10iumd32 igd10iumd32
Adapter Drivers (GPU #2)	nvd3dumx,nvwgf2umx,nvwgf2umx nvd3dum,nvwgf2um,nvwgf2um
Adapter RAM	Unknown
Adapter RAM (GPU #2)	2048
Asynchronous Pan/Zoom	none
Device ID	0x0416
Device ID (GPU #2)	0x11e2
Direct2D Enabled	true
DirectWrite Enabled	true (6.3.9600.17795)
Driver Date	3-16-2015
Driver Date (GPU #2)	5-11-2015
Driver Version
Driver Version (GPU #2)
GPU #2 Active	false
GPU Accelerated Windows	1/1 Direct3D 11 (OMTC)
Subsys ID	35371558
Subsys ID (GPU #2)	35371558
Vendor ID	0x8086
Vendor ID (GPU #2)	0x10de
WebGL Renderer	Google Inc. -- ANGLE (Intel(R) HD Graphics 4600 Direct3D11 vs_5_0 ps_5_0)
windowLayerManagerRemote	true
AzureCanvasBackend	direct2d 1.1
AzureContentBackend	direct2d 1.1
AzureFallbackCanvasBackend	cairo
AzureSkiaAccelerated	0
This also happen with native modal dialogs (e.g. Save File as...), so likely no graphics issue.

Report from Firefox 39.0b2 (64 bit) 20150601171003, Windows 8.1:

I had recorded the data twice before, but these didn't show red blocks in the timeline.
Component: Graphics → JavaScript Engine
Another recording without red blocking indicators but a 16 seconds GC gap, it seems:
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