A few days ago an ad "Powered by LaSuperba" is showing on every broser of my Ubuntu 14.04. My main browser is google-chrome, but it happens on Firefox and Opera aswell. I noticed that it doesn't happen on incognito mode, but even removing EVERY extension from Chrome didn't do the trick.
- Update I've also tried removing every browser preference file, reinstaled the SO keeping the /home partition and the problem is still there. So I think it hides somewhere in my home dir.
It looks like that this ads overlays something on the browser using SWF. Some sites like feedly even stop working because of this "overlay".