Closed Bug 464864 Opened 12 years ago Closed 12 years ago

After updated, Firefox 3.0.4 uses 100% of the CPU while idle.


(Firefox :: General, defect)

3.0 Branch
Windows Vista
Not set





(Reporter: geeknik, Unassigned)


User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv: Gecko/2008102920 Firefox/3.0.4
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv: Gecko/2008102920 Firefox/3.0.4

I just noticed that after upgrading from Firefox 3.0.3 to 3.0.4, that Firefox is using 100% of the CPU while doing nothing.  I can close Firefox, and then re-open Firefox to a blank page, and it's using 100% of the CPU in task manager.

Reproducible: Always

Steps to Reproduce:
1. Launch Firefox.
2. Let Firefox Sit Idle.
3. Launch Task Manager and watch Firefox use 100% of the CPU
Actual Results:  
Firefox uses 100% of the CPU.

Expected Results:  
Firefox should not being using 100% of the CPU while idle.
Are any Firefox extensions installed?  Check Tools->Add-Ons->Extensions to get a full list.
Version: unspecified → 3.0 Branch
Adblock Plus
Always Remember Password v0.6
CustomizeGoogle v0.76
Download Statusbar v0.9.6.3
Downthemall v1.0.3
Gmail Manager v0.5.5
Menu Editor v1.2.6
SearchStatus v1.26
StumbleUpon v3.27
What plugins are you using also?
I haven't tested upgrading from 3.0.3 to 3.0.4 with a new profile nor have I tested upgrading from 3.0.3 to 3.0.4 and going into safe mode.

Here are the plug-ins that I have installed.

Shockwave Flash 9.0 r124
Default Plug-in
Adobe Shockwave for Director Netscape plug-in, version 11.0
QuickTime Plug-in 7.5 (861)
Microsoft® Windows Media Player Firefox Plugin
DivX Web Player version
Silverlight Plug-in 2.0.30523.8
Java Plug-in 1.6.0_07 for Netscape Navigator (DLL Helper)
Make sure to update your Flash to version 10 (most likely unrelated, but good practice). Also, update your Java to 6 Update 10, and quicktime to 7.5.5.
after doing comment 6 and starting in safe mode, please post your results.
Whiteboard: closeme 2008-12-15
java is now update 11
@Reporter, we have not heard back from you in a while, so I am closing this bug as INCOMPLETE. You can reopen this bug if more information becomes available. Some helpful information you can provide us is found at
Closed: 12 years ago
Resolution: --- → INCOMPLETE
Whiteboard: closeme 2008-12-15
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