The perennial Mozilla Firefox has hit version 50. Launched back in 2002, Firefox has faced a lot of tough competition over the years, first from Internet Explorer and then from Chrome, but it continues to be a popular browser with a faithful user base. Version 50 is not a massive upgrade and if you have auto update enabled, you wouldn't even notice anything different. But there are minor changes underneath, such as 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...
Source: http://www.gsmarena.com/firefox_hits_version_50-news-21666.php
