By default bootstrap doesn't allow for tooltips being active on disabled buttons. However, there seems to be a bug in Firefox where if the tooltip is showing when the button becomes disabled it will continue to show until the button is re-enabled and the user hovers in and out of the button. In the same fashion, if the button is removed while the tooltip is showing then the tooltip will stick around again.

I've created a simple jsBin to showcase both scenarios:

1. The first two buttons have tooltips. If you click the first, you'll see it stick around while the button is disabled. The third button will disable/enable the first two buttons, so you can click that to re-enable the first and will then be able to remove the tooltip.
2. The second button has a tooltip, and clicking it will remove all the buttons on screen. Doing so will leave the tooltip hanging around and there will be no way to remove it. If you had already disabled the first button by clicking on it, you'll now have two tooltips that will stick around until you refresh.

The bug does not present itself in Chrome (v39), but does in Firefox (v35).