If you regularly share your Android gadgets with others, you'll be glad to hear that Mozilla has officially released Firefox 25. The finished web browser lets Android users run guest sessions, which hide personal info while friends borrow a device. Mobile surfers also get a mixed content blocker to prevent attacks on partially unencrypted websites. As for the desktop version? It's not getting quite as substantial an upgrade, although the software now supports advanced sound effects through Web Audio. Whichever Firefox client you prefer, you'll find your relevant update at one of the source links.