Web browsers are among the most essential pieces of software we use daily, yet we often take them for granted. Most users settle for whatever default ships with their devices -- and that's a mistake.

I'm always skeptical when a web browser claims to help with mental relaxation. But Opera's new Air browser was surprisingly useful, integrating handy tools for focus, meditation, exercises, and more.

A developer version of any given piece of software is typically aimed at those willing to test features, find bugs, and preview new capabilities. Developer versions aren't typically as stable as ...