width boundary on the tabs appears missing these days Rated 3 out of 5 stars

When I click on the tabs in the treeview to bring them in focus, they scroll all the way to the right so I only see blank tabs and the close icon. Is it possible to set a max width boundary on the tabs or to enfoce that tabs cannot go wider than the viewable tree size? The only fix is to restart the browser when it gets like this...and it gets like this every other day now. See the behavior here: http://imgur.com/AcYRBq4

This review is for a previous version of the add-on (0.14.2014050102.1-signed).