Emergency Bulletin: Firefox 0 day in the wild. What to do.
We’re publishing this as an emergency bulletin for our customers and the larger web community. A few hours ago a zero day vulnerability emerged in the Tor browser bundle and the Firefox web browser. Currently it exploits Windows systems with a high success rate and affects Firefox versions 41 to 50 and the current version of the Tor Browser Bundle which contains Firefox 45 ESR. … — Wordfence (2016-Nov-30)
⚠️ tl;dnr – switch browsers to Chrome, Safari or a non-firefox based browser that is secure until the Firefox dev team can release an update.
UPDATE (2016-Dec-01) : fixed in Firefox 50.0.2 Release