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File -> New Tab command don't work. Ctrl+T also don't work anymore.

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Suddenly Ctrl+T and File -> New Tab stop working. But I can open new tab by right mouse click on URL.

Suddenly Ctrl+T and File -> New Tab stop working. But I can open new tab by right mouse click on URL.

Gekozen oplossing

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

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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:

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

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Gekozen oplossing

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

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Yes it works in Safe-mode. Thank you

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I uninstall Ask Toolbar and it solve the problem.

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

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I hawe a problem with new Tabs