Long ago, I would use Tab-Mix Plus but that functionality went away around FF57. For most cases since then, Cntl-Shift-T works well. But I found a use case where Cntl-Shift-T does not work. If one has an active form in progress in given tab, then opens another link on top of that, then closes the tab with Cntl-W or equivalent, then after the CS-T the form progress from the overlaid url is lost. I use Cntl-W so freely that I can miss that I have accidentally closed tabs that I normally like to keep open. I sometimes don't notice till much later, too long for easy CS-T and I have to recreate from other resources. I have already removed the X-close buttons per tab. Tab-Mix Plus would just prevent closing of protected tabs all-together and prevent both of these issues. I have my own webapp framework, and my primary way to workaround this is use target=_blank liberally on local links. But that is an unnatural process in many ways with extra overhead of creating and destroying tabs rather that simply redirecting the current one. Maybe there's another way around all of this?