An anonymous reader writes: Mozilla today launched Firefox 40 for Windows, Mac, Linux, and Android. Notable additions to the browser include official Windows 10 support, added protection against unwanted software downloads, and new navigational gestures on Android. Firefox 40 for the desktop is available for download now on Firefox.com, and all existing users should be able to upgrade to it automatically. As always, the Android version is trickling out slowly on Google Play. Changelogs are here: desktop and Android.