> My TabOpen/CloseStudy data is more then likely skewed.
> Extensions (Add-ons) responsible for this.
>
> Tab Mix Plus
> Tree Style Tab
> Grab And Drag (This is the program that I think is the culprit to
> the problem.)
LastTab also affects this: when closing the current tab, it selects
the previously selected tab (which is very usually the one I'd want).