Security experts say it's best for users to create new passwords for each of their online accounts.

CNN: Twitter hack raises questions about 'cloud computing'

By resetting the browser, it creates a new user profile and migrate any bookmarks, passwords, cookies and form data to that new profile.

FORBES: Firefox 13 Gets "Reset" Button

FIX's flaws, including a lack of encryption on passwords and usernames, aren't new.

FORBES: Magazine Article

Mozilla is also trying to persuade websites to adopt a new identity system called Persona that aims to eliminate passwords.

WSJ: Web Browsers Are Reinvented

Further focusing on efficiency, this new update adds the ability to sync autofill and saved passwords across mobile devices.

ENGADGET: Chrome beta for Android delivers a proxy-based speed boost, now syncs autofill and saved passwords