This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

This thread was archived. Please ask a new question if you need help.

Firefox 4.0 works fine, then freezes or crashes

  • 1 reply
  • 19 have this problem
  • 3 views
  • Last reply by Xircal

baksheesh
baksheesh
more options

Firefox 4.0 on Vista the browser will run fine for 30 min to 3-4 hours then begin freezing for increasingly long periods on each mouse click or attempt to move the scroll bar. Eventually it locks up.

Problem is most noticeable after returning to FF after i'ts been the inactive window for a period of time. Sometimes there is a message that a Java script or Flash plugin has stopped working, other times nothing. Same results regardless of cancelling/continuing script, leaving or reloading plugin.

Typically, first click on the FF window is met with the (Not Responding) warning, then a long delay; window becomes active, another click or scroll bar move initiates another long delay, etc. It may recover for a while, but then after seemingly random periods starts freezing for long periods. Memory and network activity appear normal during this time.

Have run FF with all themes and extensions disabled, and updated all plugins, but same problem. No crash report - as the FF simply locks up until I close it with TaskManager.

Any suggestions?

Firefox 4.0 on Vista the browser will run fine for 30 min to 3-4 hours then begin freezing for increasingly long periods on each mouse click or attempt to move the scroll bar. Eventually it locks up. Problem is most noticeable after returning to FF after i'ts been the inactive window for a period of time. Sometimes there is a message that a Java script or Flash plugin has stopped working, other times nothing. Same results regardless of cancelling/continuing script, leaving or reloading plugin. Typically, first click on the FF window is met with the (Not Responding) warning, then a long delay; window becomes active, another click or scroll bar move initiates another long delay, etc. It may recover for a while, but then after seemingly random periods starts freezing for long periods. Memory and network activity appear normal during this time. Have run FF with all themes and extensions disabled, and updated all plugins, but same problem. No crash report - as the FF simply locks up until I close it with TaskManager. Any suggestions?

All Replies (1)

Xircal
Xircal
more options

You have Shockwave For Director installed which can play some enhanced flash videos, but you don't appear to have the Flash player installed. Try installing that first of all, download from: http://get.adobe.com/flashplayer/

If that fails to resolve the problem, try running Firefox in Diagnose Firefox issues using Troubleshoot Mode. If it works correctly in that configuration, then one of your add-ons is the culprit.