Rated 4 out of 5 stars

"After the update FF 45, I can't see the saved logins". I got the same problem. I see them when I disable MP though.

This review is for a previous version of the add-on (1.21.3.1-signed). 

It was fixed in v1.21.4
https://github.com/vanowm/MasterPasswordPlus/issues/85