527607 - firefox hogs a lot of CPU cycles gradually in Windows 7

Status: RESOLVED INCOMPLETE

(Firefox :: General, defect)

Description

[Madhura]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.1.5) Gecko/20091102 Firefox/3.5.5
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.1.5) Gecko/20091102 Firefox/3.5.5

Sorry if this has already been noticed, but it is very frustrating to see firefox slowly hogging a lot of CPU cyclee on Windows 7 Professional RTM build. 
I have a 2 gb machine, and I have noticed this when a lot of tabs were open, and firefox had been running through a series of sleep-hibernate-restores on the machine.
Also, firefox taes atleast half a minute to start up, so when I click a new link, I never realise that firefox is in the process of opening it, and end up clicking multiple times - results in a lot of firefox windows. I had to switch my default back to IE8 because of this.

I guess this is a know issue, but it would be great to see an update for this. I heard the next version of firefox has a fix for this (not sure) but now that Windows 7 has RTMed, it would be nice to have an update to fix this soon.


Reproducible: Always

Steps to Reproduce:
1. On windows 7 Professional machine with 2 GB ram, start firefox. It takes about a minute to start.
2. Keep firefox running (about 2 days or more), and let the mahcine go through a series of sleep/hibernate/restore cycles
3. Open task mgr and view the performance of firefox.
Actual Results:  
Firefox is extremely slow.

Expected Results:  
Firefox should work smoothly and quick response to clicks.

Comment 1

[Matthias Versen [:Matti]]

PLease try http://support.mozilla.com/en-US/kb/Safe+Mode

Comment 2

[Tyler Downer [He/Him]]

Reporter, are you still seeing this issue with Firefox 3.6 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

Comment 3

[Tyler Downer [He/Him]]

No reply, INCOMPLETE. Please retest with Firefox 3.6.x 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.