467748 - After moving Firefox Window on desktop it seems to hang until Alt-Ctrl-Del used to invoke task manager

Status: RESOLVED INCOMPLETE

(Firefox :: General, defect)

Description

[David Goadby]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.4) Gecko/2008102920 Firefox/3.0.4
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.4) Gecko/2008102920 Firefox/3.0.4

On some busy websites (ie lots of external banner URLS or flash) if I try to move the Firefox Window on the desktop the system appears to freeze. By freeze I mean RSS (if running( will stop), downloads will stop and no other windows can be selected. After using Alt-Crtl-Del to invoke the Task Manager everything bursts back into life again. If I do not move the Firefox window then usually ok.

I have tried disabling a number of my add-ons but that doesn't seem to affect the problem.

I will try to get a set of conditions, including a URL, that permits easy replication of this problem. In the meantime I am regretting upgrading from 2.0! 

Reproducible: Sometimes

Steps to Reproduce:
1.Move Firefox window whilst displaying a busy URL (sky.com/news sometimes)
2.Try to select other windows
3. Invoke Task Manager using Alt-Ctrl-Del to unfreeze system.
Actual Results:  
Ultimately I have to kill Firefox and restart afresh to get a usable system again.

Expected Results:  
Moving a Window should not cause the OS to freeze. 

I think an event is being lost somewhere. It seems that invoking the Task Manager unlocks the Firefox task.

Comment 1

[David Goadby]

This URL will cause the problem: 

http://content.techrepublic.com.com/2346-10878_11-212363.html

As well as moving the Window, resizing seems to cause the problem too.

Also,I notice that CPU usage is around 50% when this problem occurs. Even after the URL tab is closed the CPU usage remains at around 50%.

Comment 2

[Nochum Sossonko [:Natch]]

Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.9.0.4) Gecko/2008102920 Firefox/3.0.4

Could not reproduce using above url. (then again I'm using Vista...)

Comment 3

[Tyler Downer [He/Him]]

This is a mass search for bugs which are in the Firefox General component, are
UNCO, have not been changed for 500 days and have an unspecified version. 

Reporter, can you please update to Firefox 3.6.10 or later, create a fresh profile, http://support.mozilla.com/en-US/kb/managing+profiles, and test again. If you still see the issue, please update this bug. If the issue is gone, please set the status to RESOLVED > WORKSFORME.

Comment 4

[Tyler Downer [He/Him]]

No reply from reporter, INCOMPLETE. Please retest with Firefox 3.6.12 or later and a new profile (http://support.mozilla.com/kb/Managing+profiles). If you continue to see this issue with the newest firefox and a new profile, then please comment on this bug.