Firefox for Android
Release Notes

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.

Firefox for Android Release

November 3, 2015

Version 42.0, first offered to Release channel users on November 3, 2015

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


  • Private Browsing with Tracking Protection blocks certain Web elements that could be used to record your behavior across sites

  • Open external URLs from Android apps in the background

  • Family-friendly browsing for Android when users create a restricted profile on tablets

  • Mobile login manager (about:logins) lists all saved logins and allows users to view/edit or delete logins

  • Support direct voice input for searching from the URL bar

  • Use scrollable tabs for panels navigation



  • Improved performance on interactive websites that trigger a lot of restyles


Web Platform


  • URLs containing a Unicode-format Internationalized Domain Name (IDN) are not redirected properly, leading to a Server Not Found error.

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All Firefox for Android downloads