Rated 5 out of 5 stars

Indispensable! Nostalgy adds an essential feature (do Thunderbird devs not use keyboards? can they not type?) and this is the new improved version complete with active support. Thank you opto!

PS 2 bugs outstanding: options should be moved to Add-on Options; and when there is a save folder suggestion, Enter should accept the suggestion instead of throwing an error.
I see the note that TAB+enter accepts the suggestion, but that doesn't work for me: I still get the error.

Other than that, perfect!

This review is for a previous version of the add-on (2.2.2). 

if there is a suggestion, you now need TAB + enter.
That comes from the new autocomplete component of TB. Don't know whether it can be changed ...

Rated 5 out of 5 stars

A must-have. Thank you opto!!
PS I contributed, if you like it you should too!

This review is for a previous version of the add-on (1.0.15).