Firefox 50.0.2 released
https://www.mozilla.org/en-US/firefox/50.0.2/releasenotes/ [www.mozilla.org]
2016-11-30 23:45
Various security fixes
Just one actually: https://www.mozilla.org/en-US/security/advisories/mfsa2016-92/
For the in the wild exploit: https://lists.torproject.org/pipermail/tor-talk/2016-November/042639.html
Some write up: https://www.wordfence.com/blog/2016/11/emergency-bulletin-firefox-0-day-wild/