Firefox Release

October 20, 2016

Version 49.0.2, first offered to Release channel users on October 20, 2016

We'd also like to extend a special thank you to all of the new Mozillians who contributed to this release of Firefox!


  • Asynchronous rendering of the Flash plugins is now enabled by default. This should improve performance and reduce crashes for sites that use the Flash plugin. (Bug 1307108)


  • Change D3D9 default fallback preference to prevent graphical artifacts (Bug 1306465)

  • Network issue prevents some users from seeing the Firefox UI on startup (Bug 1305436)

  • Web compatibility issue with file uploads (Bug 1306472)

  • Web compatibility issue with Array.prototype.values (Bug 1299593)

  • Various security fixes


  • Diagnostic information on timing for tab switching (Bug 1304113)

All Firefox downloads