Firefox 42 is now available as a free download for Windows, Mac OS X, GNU/Linux, and Android from
http://www.mozilla.org/firefox/new/.
We recommend that users keep up to date with the newest version of Firefox for the latest features and fixes.
This release contains:
* Private Browsing with Tracking Protection
* Control Center
* Indicator added to tabs that play audio
The release notes for this release are available at:
Desktop:
http://www.mozilla.org/firefox/notes
Mobile:
http://www.mozilla.org/mobile/notes
Sylvestre
Firefox Release Manager