I was just reading on another tech site that the nifty new browser firefox 13 that just released with the all new homepage screenshots.
Has now been discovered to be a security risk because it randomly takes screen of your desktop as you navigate the web to create your homepage which could potential put your private info at risk like email content or worse yet banking info.
Until Firefox comes up with a solution to this problem I strong suggest if you using a public computer or even the family computer
to set your browser options to private browsing and when leaving the computer to clear your browser history