Start Firefox in Diagnose Firefox issues using Troubleshoot Mode to check if one of the add-ons is causing the problem (switch to the DEFAULT theme: Tools > Add-ons > Themes).

• Don't make any changes on the Safe mode start window.

See:

• Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems
• Troubleshoot issues with plugins like Flash or Java to fix common Firefox problems

If it does work in Safe-mode then disable all extensions and then try to find which is causing it by enabling one at a time until the problem reappears.

• Use "Disable all add-ons" on the Safe mode start window to disable all extensions.
• Close and restart Firefox after each change via "File > Exit" (Mac: "Firefox > Quit"; Linux: "File > Quit")

Other things that need your attention:

Your above posted system details show multiple Java Console extensions. You can uninstall (remove) the Java Console extensions, you do not need them to run Java applets.

See http://kb.mozillazine.org/Java#Multiple_Java_Console_extensions

My guess is that Ask Toolbar you have installed is causing that.

Yes it works in Safe-mode. Thank you

I uninstall Ask Toolbar and it solve the problem.

Yes thanks very much, I uninstalled ASK toolbar and my tabs will open again.

I hawe a problem with new Tabs