504933 - Computer lockup for a few minutes when closing Firefox

Status: RESOLVED INCOMPLETE

(Firefox :: General, defect)

Description

[Carl M]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1.1) Gecko/20090715 Firefox/3.5.1
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1.1) Gecko/20090715 Firefox/3.5.1

I found that after installing 'Silverlight' on my Firefox browser that my PC would lockup for sometimes as long as five minutes. I was using Silverlight to stream audio from a radio station I enjoy. My cursor would move but mouse clicks did nothing and ctrl/alt/delete wouldn't even bring up the Windows Task Manager for an extended amount of time. Then, it seemed that Silverlight would finally release operations back to me. It took me quite some time to find the 'culprit' because I was disabling various add ons to find which one was 'guilty'. So, if YOU are experiencing a symptom similar to mine, try disabling 'Silverlight' first and see if Firefox closes quickly without forcing you to wait.

Reproducible: Always

Steps to Reproduce:
1.go to www.kfog.com
2.click to listen will launch a streaming player
3.Player recommends 'Silverlight' but computer will lockup when using that add on.
Actual Results:  
PC will lockup for an extended amount of time. Finally the computer is released to standard operation.

Expected Results:  
Naturally when closing Firefox I expect to have standard operation immediately.

After disabling add ons one at a time and still having the problem each time it took quite awhile to find that Silverlight was the cause.
Silverlight does NOT affect internet Explorer...naturally....

Comment 1

[Matthias Versen [:Matti]]

Does the Silverlight plugin affects any other browser except IE ?
IE use a complete different silverlight (activeX plugins) while all other browsers are using NPAPI Plugins.

Comment 2

[Tyler Downer [He/Him]]

Reporter, are you still seeing this issue with Firefox 3.6.12 or later in safe mode? If not, please close. These links can help you in your testing.
http://support.mozilla.com/kb/Safe+Mode
http://support.mozilla.com/kb/Managing+profiles
Also, please consider using the most recent Firefox 4 beta build, your bug may be resolved there.

Comment 3

[Tyler Downer [He/Him]]

No reply, INCOMPLETE. Please retest with Firefox 3.6.13 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.