FF unresponsive, does not release memory when tabs closed




12 years ago
10 years ago


(Reporter: jjourard, Unassigned)



2.0 Branch
Windows XP

Firefox Tracking Flags

(Not tracked)


(Whiteboard: closeme 2008-25)



12 years ago
User-Agent:       Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; .NET CLR 1.1.4322; .NET CLR 2.0.50727)
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv: Gecko/20070515 Firefox/

After using 7-12 tabs and leaving open overnight, Firefox became unresponsive. I could open new tabs but they would indicate "Loading" and never change after that.  I could get drop down menus and make selections but they did not produce any action. In Windows Task manager, FF shows about 115MB memory in use when it became unresponsive. I could right click on tabs to close them but no red X was usable because tab did not display red X when selected. After closing all tabs except one, Taks Manager shows 112MB memory still in use and browser unresponsive as before. I started 2nd instance of FF to compare memory usage but it would not start & did not appear in Task Manager.  IE works normally under same conditions.

Reproducible: Sometimes

Steps to Reproduce:
1.Be active in browser, open close numerous tabs, leave 7 tabs open overnight.
2.Attempt to use Firefox one or two days later
Actual Results:  
O experienced the (non)performance described in section "Details" above.

Expected Results:  
It should have behaved like a functional browser; respond to menu choices, open URLS in new tabs, open new blank tabs, launch a second instance or the browser when commanded to do so.

My experience has been described to the best of my ability.

Comment 1

12 years ago
Killed FF, waited 30 seconds and launched FF again. It offered to Restore previous session, I said Yes.  When session restored, Task Manager showed only 83MB memory in use and browser behaved normally.  
Do you have the latest flash and java versions installed?

Comment 3

12 years ago
I believe so. Java 1.6.0_06
Flash - I suppose but don't know.
1. Don't know how to tell which version Flash is installed, but 
2. I do get all available updates on a regular basis.
When you type about:plugins in your locationbar you get a list of installed plugins with the version numbers. Flash should be 9.0x.

Comment 5

12 years ago
Flash is 9.0 r45

Comment 6

11 years ago
111MB is not a lot of memory, unless you've got 512B or less
1 install flashblock
2 narrow down what link(s) are taking the most memory
Keywords: perf
Version: unspecified → 2.0 Branch

Comment 7

11 years ago
Jeff, any change or progress?
Whiteboard: closeme 2008-25

Comment 8

10 years ago
Try upgrading to Firefox 3.

Last Resolved: 10 years ago
Resolution: --- → WORKSFORME
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