Rated 4 out of 5 stars
Very good addon, but, dear developer, you must follow quicly adobe and mozilla update!
See : https://bugzilla.mozilla.org/show_bug.cgi?id=1323300
New flash version is buggy: I have several crash reports for it. That's why my update was delayed.
BTW new Playflash version was uploaded to AMO 2+ days ago (2016-12-19). It is being queued to review and I can do nothing here.