I used to have the Tab Mix Plus extension which no longer works in Firefox. The one feature I really miss from this extension is the ability to alternate between 2 tabs by clicking on one of them. I know that there are various extensions that allow you to switch tabs using shortcut keys and I do use the Switch to Previous Active Tab extension which is useful but I do miss the simplicity of being able to just click on a tab to switch to the previous and even after several years without it I still often try to do it, forgetting that it no longer works. Is there any extension or setting that can reinstate this feature?