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I installed Chromium from the Software Centre yesterday and realised it wasn't showing up in Alt + Tab switching so I decided to go back to Firefox. It turns out Firefox also doesn't show up, but only since installing Chromium.


Screenshot displaying the problem, Firefox is open but not showing up in Alt + Tab
Also, neither show up as open in the launcher (no little triangle) so switching using that just opens a new window. Gimp has the same problem. Any ideas for a fix?
Screenshot showing no triangle for Firefox but showing one for Thunderbird

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up vote 9 down vote accepted

Press Alt-F2

Type unity --replace

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Thanks, that worked! – captainjamie May 21 '12 at 9:21
    
You forgot to mention that this command will close all open programs and log you out. – Moreno Sep 16 '15 at 21:32

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