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I have had Firefox for a few years and have been very satisfied with all of it's features and qualities. I work a great deal from home and have always enjoyed the convenience of being able to work off of 3 or 4 Firefox screens at one time. By pulling up one screen over the other and then go back and forth (as I still am able to do with Internet Explorer), saves a lot of time and NEEDLESS effort.

  Since your latest update the other day, I am now only able to get that 1 screen and no matter how many times I click on the Firefox Icon on my icon screen, no other Firefox screens will come up. I am stuck with that 1 screen... 
   PLEASE HELP!!!! I have also lost my Yahoo search tool bar due to your upgrade, as well as several others which I cannot seem to retrieve. 
     Thank you so Very much in advance for addressing and correcting this error.

Additional System Details

Installed Plug-ins

  • Adobe PDF Plug-In For Firefox and Netscape "9.5.4"
  • Google Update
  • Shockwave Flash 11.5 r502
  • Adobe PDF Plug-In For Firefox and Netscape "9.5.3"
  • np-mswmp
  • The QuickTime Plugin allows you to view a wide variety of multimedia content in Web pages. For more information, visit the QuickTime Web site.
  • RealJukebox Netscape Plugin
  • RealNetworks(tm) RealPlayer Chrome Background Extension Plug-In
  • RealPlayer(tm) HTML5VideoShim Plug-In
  • RealPlayer(tm) LiveConnect-Enabled Plug-In
  • RealPlayer Download Plugin
  • ReferenceBoss Installer Plugin Stub for 32-bit Windows
  • 4.1.10329.0
  • iTunes Detector Plug-in
  • Winamp Application Detector
  • npdivxplayerplugin
  • 1.9.0042.0
  • Npdsplay dll
  • DRM Store Netscape Plugin
  • Office Plugin for Netscape Navigator
  • PopCap Games Plugin
  • npunagi2
  • Macromedia Shockwave for Director Netscape plug-in, version 10.1
  • Musicnotes Viewer plugin 1.15.4


  • User Agent: Mozilla/5.0 (Windows NT 5.1; rv:19.0) Gecko/20100101 Firefox/19.0

More Information

  • Top 25 Contributor
  • Moderator
251 solutions 3018 answers

You are stuck with one screen? Do you mean only one window? You can press "ctrl" and "n" to open a new window. Yahoo toolbar not working is also not our fault at Yahoo needs to fix their product and has not been doing so for the past 3 versions of Firefox.

Thank You!

Equestrian 0 solutions 2 answers

Since I upgraded to Firefox 19 from 18.0.2, on my Windows XP (SP3) laptop, I, too, can no longer open a new window. File-->New Window does nothing; also can no longer tear off a tab and open it in a new window (it stays where it is). Also, if I right-click on a tab and select Move to New Window, nothing happens. All of these worked fine in FF 18.0.2. All of these work fine with FF 19 on Windows 7. Only an issue on my XP laptop.

After trying to open a new window, and not seeing the new window come up (and yes, I waited a long time), I decided to close my current window, which had multiple tabs open. Instead of just closing, it pops up the message reminding me that I'm about to close all those tabs. If I say close, and then go into the Task Manager, the Firefox application has disappeared (as expected), but the firefox (and plug-in container) processes are still running. So I have to manually kill the Firefox process to get it to quit. it's as if it thinks there is another Window open (the one I tried to open but never appeared). This happens every single time! I've restarted my laptop, and that does not resolve the problem.

Is there a way to downgrade back to v 18.0.2 until this is fixed?

  • Top 10 Contributor
  • Moderator
10753 solutions 96760 answers

Start Firefox in Safe Mode to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance).

  • Do NOT click the Reset button on the Safe mode start window or otherwise make changes.
Equestrian 0 solutions 2 answers

Thank you, Cor-el! I restarted in Safe Mode and the problem went away. I found a suspicious Add-on (ShoptoWin4), and once I removed it and restarted Firefox normally, my new windows now open.

Thank you so much for your help!

HB_BluzFan 0 solutions 1 answers

I have the same problem with Vista Home Premium. I still don't see any other option except to revert to an older version. It seems that every time you have an update it one or more new problems occur.

  • Top 10 Contributor
  • Moderator
2043 solutions 8893 answers

please refer to the answer above - this is likely caused by an extension.