Rated 3 out of 5 stars

Not to say, that Python workaround is comfortable…

A hint, Python script file shall be palced in a folder relating to ThunderBird, and not somwehre else spinning around would be fine.

Anyway, 3 stars only because list of browsers is placed in a sub menu (cascaded menue) stops usability.

This review is for a previous version of the add-on (7.2.5).