I'm using Ubuntu 12.04, and I've installed Gnome3 on it.
Firefox used to run normally, but one day I used the "snap" feature to snap it to the left and then maximized it again. The websites however refuse to use the rest of the screen and instead use only the left half (actually close to 70%) as shown in the screenshot.
I haven't faced this problem with any other application, and any number of application restarts or system restarts (including switching to Unity) haven't helped.
If it helps, I was using the Tree Style Tab extension to display my tabs in a sidebar on the left, but disabling the extension hasn't helped, as the screenshot shows.
How can I get it back to normal?