Rated 5 out of 5 stars

Well, I expected something like this when Firefox forced 'Legacy' tag on all add-ons and gave ultimatum to the developers. For example, right now I have 7 add-ons permanently enabled and 6 of them will not work with brand new 57 Firefox ver. that will grace us in a month.
I think I'll stick to 56 FF and old version of MAFF, thank you very much. I mean, I can change old add-ons for 57+ compatible alternatives. I can also switch Firefox for Chrome, because without some of them there's no point in using Firefox. MAFF was one of those 'must have' add-ons.
Okay, forgive my rant. Great add-on anyway.

This review is for a previous version of the add-on (5.1.2).