See what’s new in Firefox!

Release Notes tell you what’s new in Firefox. As always, we welcome your feedback. You can also file a bug in Bugzilla or see the system requirements of this release.

50.0

November 15, 2016

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

Playback video on more sites without plugins with WebM EME Support for Widevine on Windows and Mac
Improved performance for SDK extensions or extensions using the SDK module loader
Added download protection for a large number of executable file types on Windows, Mac and Linux
Increased availability of WebGL to more than 98 percent of users on Windows 7 and newer
Added Guarani (gn) locale
Added option to Find in page that allows users to limit search to whole words only
Updates to keyboard shortcuts
- Set a preference to have Ctrl+Tab cycle through tabs in recently used order
- View a page in Reader Mode by using Ctrl+Alt+R (command+alt+r on Mac)

Various security fixes
Fixed rendering of dashed and dotted borders with rounded corners (border-radius)

Blocked versions of libavcodec older than 54.35.1
Added a built-in Emoji set for operating systems without native Emoji fonts (Windows 8.0 and lower and Linux)