Sadly, this doesn't make the "tabs bar" stick on the bottom as it should. When enabled the tab bar can display on top or bottom, when disabled the tab bar can display on top or bottom. It constantly changes position when Firefox is opened. If opening two windows in one it shows on top, and in the other it shows on bottom. From tests in various windows, I suspect that the bookmarks toolbar and this add on are not happy with one another. This is true in either Linux Xubuntu 14.04 or Windows 7 Pro.
Sadly, this doesn't make the "tabs bar" stick on the bottom as it should. When enabled the tab bar can display on top or bottom, when disabled the tab bar can display on top or bottom. It constantly changes position when Firefox is opened. If opening two windows in one it shows on top, and in the other it shows on bottom. From tests in various windows, I suspect that the bookmarks toolbar and this add on are not happy with one another. This is true in either Linux Xubuntu 14.04 or Windows 7 Pro.