Rated 1 out of 5 stars

Από τον/την Martin Schröder στις Νοέμ. 25, 2015 · μόνιμος σύνδεσμος

It was very nice when it worked, but with FF42 the GMail support does not work anymore.
And since the homepage is gone and the github page gives a 404, this add-on seems to have been abandoned.