Thread: Unable to open multiple Firefox windows after first successful opening

I tried to open a multiple tab on Mozilla Firefox I get is a brief flash of the hourglass and then nothing.

I do not, however, have any problems opening up multiple tabs in that one open Firefox window.

I have run Registry Booster, CCleaner etc and I have also re-installed Firefox but not solve the problem.

1) once you open Firefox, try File > Open New Window

If you are running Windows 7, you can also Right Click on the icon on the Taskbar then where it says Mozilla Firefox in the pop up, right click on this and choose open.