Comment by Narretz

I find it interesting that the gif shows the Tree Style Tab extension without the default Firefox tab bar, but at least in FF57, the tab bar can only be hidden with a custom userchrome.css, so the otu of the box experience is flawed at the moment. This is at the moment my biggest gripe with the extension, and I think the interview / article could have shown the default state of the extension, and pointed out that an API for hiding the tab bar is at least being worked on: https://bugzilla.mozilla.org/show_bug.cgi?id=1332447