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Can no longer open a new tab for one window browsing

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I used to be able to open a new tab without having to open a new firefox window. I can no longer do this. My Firefox version is: 3.6.73

I used to be able to open a new tab without having to open a new firefox window. I can no longer do this. My Firefox version is: 3.6.73

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Start Firefox in Diagnose Firefox issues using Troubleshoot Mode to check if one of the add-ons (Ask.com toolbar) 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:

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The Ask Toolbar is causing that in the Firefox 3.6.13 version. Evidently something in that extension isn't compatible with a Firefox security fix. Disable that extension or un-install it.