Firefox does not switch not between tabs if clicked 33.1.1 worm?

Since I've upgraded to 33.1.1 I can't switch between tabs and now I have a tab ghost between the current tab and the sign + to open a new tab. Even if I open the new tab, I can't switch to him.

Help!

Update: remove the Restorer of the classic theme add-on seems to have been the culprit. Hope that helps someone else running this problem.

Tags: Firefox

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