今更のネタだけど
https://blog.mozilla.org/futurereleases/2015/10/08/npapi-plugins-in-firefox/
が 2015 OCT 8 なのか
Because Adobe Flash is still a common part of the Web experience for most users, we will continue to support Flash within Firefox as an exception to the general plugin policy. Mozilla and Adobe will continue to collaborate to bring improvements to the Flash experience on Firefox, including on stability and performance, features and security architecture.
Flash Player が NPAPI / PPAPI / ActiveX 存在するのは変わらずと
10/24 追記
Firefox における NPAPI プラグインの取り扱いについて - Mozilla Japan ブログ
この記事は米国 Mozilla Future Releases ブログに掲載された "NPAPI Plugins in Firefox"の抄訳です
