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Firefox keeps "Not Responding" randomly, then comes back after 10-15 Seconds.


Every now and then, when I'm on Firefox it will not respond then the window will fill white and at the top it will say "Mozilla Firefox (Not Responding)".

It responds after about 10-15 seconds but this keeps happening every 2-3 Minutes and is making Firefox unusable to watch videos on Youtube and read other things as when it starts responding it take me back to the top of the page.

I cannot pinpoint which websites this is on but it normally (But not always) happens when I have more than one tab open (Usually on Youtube + SammyServers.com)

Modified by Noah_SUMO

Additional System Details

Crash ID


Installed Plug-ins

  • EA Battlefield Heroes Updater
  • Dassault Systemes 3DVIA Shape Plug-in
  • Office Plugin for Netscape Navigator
  • Adobe PDF Plug-In For Firefox and Netscape
  • nprt
  • NPRuntime Script Plug-in Library for Java(TM) Deploy
  • Default Plug-in
  • Pando Web Plugin
  • Shockwave Flash 10.1 r85
  • GEPlugin
  • Next Generation Java Plug-in 1.6.0_21 for Mozilla browsers
  • 4.0.50917.0
  • Windows Presentation Foundation (WPF) plug-in for Mozilla browsers
  • Google Update
  • Wacom Dynamic Link Library


  • User Agent: Mozilla/5.0 (Windows; U; Windows NT 6.0; en-GB; rv: Gecko/20100824 BTRS25860 Firefox/3.6.9 ( .NET CLR 3.5.30729; .NET4.0C)

More Information

chipmalee 0 solutions 6 answers

pittsy2004 said: "Go to 'Run' and open 'cmd' • Type 'netsh' in command console then press enter • Then type 'winsock' and press enter and then type reset • Restart Your PC"

It works!!! Firefox 3.9.28 OS: XP, SP2 on desktop Don't know why and googled "what does winsock reset do" but still no answer. Problem occurred 1 week ago on all my PCs and didn't matter version of Firefox update.

Will try next & report on: Firefox 3.9.28 OS: XP, SP2 on netbook

Firefox 12.0 OS: XP, SP3 on desktop

Modified by chipmalee

FirefoxAteIE 0 solutions 2 answers

This seems to work for me. Just deleted "places.sqlite" from the Profile Directory under Help/Troubleshooting.

rosebud101 0 solutions 5 answers

When you deleted "places.sqlite" did you loose your bookmarks?

Apparently, there could be some implications to deleting this file, but if this is indeed the solution and can be confirmed by others then I am willing to try it ... or almost anything else that solves this problem..

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10756 solutions 96800 answers


FirefoxAteIE 0 solutions 2 answers

It may have deleted bookmarks, but I use Xmarks, so they may have been restored through that. All I know for sure is the bookmarks were still there, but the icons associated with the bookmarks disappeared. I had to click on each one bookmark and the icons appeared in my bookmark list again. I have not had a repeat of the not responding problem sine I deleted the file.

rosebud101 0 solutions 5 answers

So I took the plunge following the instructions and deleted "places.sqlite", unfortunately I was not able to regain many icons associated with the bookmarks and clicking on these did not restore the icon.

I have an exported backup of the bookmarks and wonder if restoring via import will correct the missing bookmark icons?

In any event, I am hopeful this will resolve the FF freezing problem and I will report back so others will know the outcome.

rosebud101 0 solutions 5 answers

OK it appears there is a difference, a site that has live cameras in various cities now appears to work mostly fine. Occasionally, FF does freeze but usually when associated with the fash plugin crashed message when it comes up.

Hope others can provide their observations of how this fix worked for them.

thurstan 0 solutions 2 answers

Google 'Firemin'. It fixes the memory leak in Firefox and stops the hanging and 'Not Responding'. I thangyooo ...