Hi Curt, it's hard to do it in one step unless your windows are small enough to see everything at the same time. Could you test doing it in two steps? (1) Click on the tab you want to move and drag it down over the page, then release the mouse. The tab should detach to a separate window. Does that part work? Reduce the size of that window so you can see other windows in the background. (2) Drag the tab in the detached window to the tab bar where you want it to go and drop. Firefox should display a little insertion icon showing where it will put the tab so you can place it among the existing tabs. Does that part work?