If you typically share your computer and your browser with a sibling, a roomie or a friend who has no respect for your privacy, this latest Google Chrome beta update might make things easier for you. It comes with a pull-down menu that lets you easily switch users, put the browser to guest mode or launch an incognito tab on Windows, Mac or Linux. According to some comments in the update's Google+ announcement, though, you still have to log off from your accounts to be sure your activities remain for your eyes only, just in case someone decides to peek. The guest mode automatically deletes the other user's browsing information, on the other hand, so they won't have to worry about you seeing their secrets.
Aside from this update, Google has also unleashed a 64-bit Chrome beta for Mac, a few days after the company released a 64-bit stable version for Windows computers. This will make the browser launch more quickly and will generally make it faster than its predecessor. Finally, the new beta update also comes with a bunch of APIs for web app devs to play with. You can get Google Chrome beta (or any other channel you want, whether stable, Canary or Dev) through The Chromium Projects website.