Can you tell me which extensions you have? Go to Help > Troubleshooting Info and copy and paste the extensions bit here.

Also, how are you trying to open a new tab? Ctrl-T? + in the tab bar? Right click, New tab or from the File menu?

Extensions

             Name
           
           	
             Version
           
           	
             Enabled
           

             ID
           
         

       20-20 3D Viewer	3.0.31.0	true	2020Player@2020Technologies.com

AddThis 3.1.0 true {3e0e7d2a-070f-4a47-b019-91fe5385ba79} Ask Toolbar 3.11.3.15590 true toolbar@ask.com Google Gears 0.5.36.0 true {000a9d1c-beef-4f90-9363-039d445309b8} Java Console 6.0.06 true {CAFEEFAC-0016-0000-0006-ABCDEFFEDCBA} Java Console 6.0.07 true {CAFEEFAC-0016-0000-0007-ABCDEFFEDCBA} Java Console 6.0.10 true {CAFEEFAC-0016-0000-0010-ABCDEFFEDCBA} Java Console 6.0.11 true {CAFEEFAC-0016-0000-0011-ABCDEFFEDCBA} Java Console 6.0.14 true {CAFEEFAC-0016-0000-0014-ABCDEFFEDCBA} Java Console 6.0.15 true {CAFEEFAC-0016-0000-0015-ABCDEFFEDCBA} Java Console 6.0.17 true {CAFEEFAC-0016-0000-0017-ABCDEFFEDCBA} Microsoft .NET Framework Assistant 1.2.1 true {20a82645-c095-46ed-80e3-08825760534b} Move Media Player 7 true moveplayer@movenetworks.com RealArcade V3 Plugin 3.0 false npmozax@real.com Java Console 6.0.19 true {CAFEEFAC-0016-0000-0019-ABCDEFFEDCBA} Java Console 6.0.20 true {CAFEEFAC-0016-0000-0020-ABCDEFFEDCBA} Java Console 6.0.21 true {CAFEEFAC-0016-0000-0021-ABCDEFFEDCBA} Java Console 6.0.22 true {CAFEEFAC-0016-0000-0022-ABCDEFFEDCBA} Yahoo! Toolbar 1.6.6.20090220 true {635abd67-4fe9-1b23-4f01-e679fa7484c1}

In the tab bar

Does any of these two methods for opening a new tab work?

• Select "File" from the Firefox menu and then select "New Tab"
• Press Ctrl+T on your keyboard

I had this problem, but the following advises a cause and fix (remove Ask toolbar) https://support.mozilla.com/hy-AM/questions/783702

Works fine now.

Please show me how to remove the Ask toolbar

1. In the Tools menu select Add-ons to open the add-ons manager.
2. In the Add-ons manager select the Extensions panel
3. In the list of Extensions click on Ask Toolbar, then click the Uninstall button
4. Restart Firefox and the Ask toolbar will be uninstalled.

That works, thanks.

if you go to help and then trouble shooting information it opens up a new tab...unorthodox but it works