Firefox 4 works slow in Windows 7 with basic theme(disabled Aero)




7 years ago
7 years ago


(Reporter: igorko, Unassigned)


Firefox Tracking Flags

(Not tracked)




7 years ago
User-Agent:       Mozilla/5.0 (Windows NT 6.1; rv:2.0b10) Gecko/20100101 Firefox/4.0b10
Build Identifier: ff4.0beta10

Firefox 4 beta 10(it was also in 9) UI works slowly in Windows 7 with Basic theme(that means Aero is disabled) You can see this wheh using main menu(wnen going through main menu items you can see how previous menu slowly dissapears and next showes- they both can be present in the same moment), link field, "save password dialog", etc
FF has no addons installed(only Feedback 1.0.4 and no matter is it enabled or no)
Bug not present when using Safe Mode(in the same time i have no addons installed)

Reproducible: Always

Steps to Reproduce:
1.Use Windows 7
2.Disable Aero theme(choose basic Theme)
3.Just use Firefox4


7 years ago
Component: Graphics → General
Product: Core → Firefox
If you start in regular (not safe) mode but turn off hardware acceleration in preferences, do you still see this issue?
Component: General → Graphics
Product: Firefox → Core

Comment 2

7 years ago
Setting gfx.direct2d.disabled to "true" fixes slowness.
And in the same time at config:support page:
Direct2D enabled         changes from "true" to "false"
DirectWrite enabled      changes from "true" to "false"
GPU Accelerated WIndows  changes from "1/1 Direct3D 10" to "1/1 Direct3D 9"

Comment 3

7 years ago
In the same time according to: my videocard supports DirectX® 10.1 and Shader Model 4.1

Comment 4

7 years ago
Firefox 4.0b11
about:support sayes:
Direct2d Enabled = Blocked for your video card driver
DirectWrite Enabled = False
GPU Accelerated WIndows = 0/1
Seems it was fixed by some of commits, related to Bug 623338.
Last Resolved: 7 years ago
Resolution: --- → FIXED
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