Two sides to the coin flip. This page - https://wiki.mozilla.org/NPAPI - is dated 4 February 2014 and mentions NPAPI current specs and specs under consideration in the future. This - http://www.firebreath.org/display/documentation/Browser+Plugins+in+a+post-NPAPI+world - isn't from Mozilla, but there's enough in that article that should have plugin developers starting to question the wisdom of investing a lot of time with NPAPI plugin development. How much of that applies to the future of NPAPI and Mozilla is questionable, since that 'group' seems to focus on Chrome more than Mozilla.