Comment 20 for bug 772063

I'm having this with Firefox right now. I was trying to find out if an add-on was the cause of a problem so I restarted Firefox with add-ons off and ticked "disable all add-ons". After that, everytime I click on its launcher icon it opens a new window instead of scaling the open windows and I never have arrows indicating open instances of it. I reenabled every add-on I have, but the launcher and the alt-tab still don't track Firefox.