Not sure what happened but with the latest stable Firefox (88.0.1 ), I had to switch the mode to v1 for the add-on to work. Mixed and v4 doesn't work.

Unreliable, sometimes the desired tab is briefly selected then the selection jumps elsewhere.


Could be a timeout issue: On a FF that is slowed down by too many open tabs (or on a slow machine), this Add-On too quickly gives up waiting to get the desired tab.

If that is the case, please, either …
… add a preference to let the user set the timeout (clumsy, because on a less loaded FF one would wait unnecessarily long); or …
… measure the FF load somehow and auto-adjust the timeout duration.


Also, the "Click outside the text fields to save." information should be highlighted and on the top of the settings page – it is too easy to overlook, but it its vital for the functioning of setting settings.

Not working on FF75.