This is not as big of a deal as some sites are making it out to be, however there are very legitimate concerns. These are not issues that are serious as the ILOVEYOU virus was a few years back, but it could affect some users.

A possible scenario for such an attack would involve the user clicking on a malicious link that would furtively plant a target file equipped with an exploit code on the computer’s hard drive. Then it would display a prompt asking the user to allow a pop-up to appear in order to play a video file or download. The attacker-supplied file would then be loaded thanks to the browser flaw, which could give the attacker local file read privileges.

So my take on this is, if you are clicking on stuff that you don’t know or understand where it is going, you run the potential of getting something not so good for your computer. There is already a fix for this.

It appears that this flaw may only apply to older versions of Firefox, prior to the current 2.0 release

If you are unsure what version of Firefox you have, click the Help button at the top of your browser and then About, it will tell you. Common previous versions are 1.0.7 and 1.5.

Upgrading to the newest version, 2.0.0.1, will not loose any of your bookmarks, installed extensions or settings.

Source: ZDNet

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