Spec for bug 941546
Note: You need to reload the page to see a transition again.
Questions? email@example.com or phlsa on IRC
Notice that the new tab starts with the minimum possible size (which is even less than the size of the plus-tab
The seperators of the inactive tabs glitch a little in this demo (they briefly overlap with the text). Please disregard that; they should of course follow the size of the tab