Mozilla addressed a critical security vulnerability with a minor Firefox update, bringing the browser to version 3.6.2. The vulnerability could potentially allow an attacker to “crash a victim’s browser and execute arbitrary code on his/her system.” Users of Firefox 3.6 will have this update automatically downloaded and installed, but you can also manually apply it by selecting “Check for Updates…” from the Help menu. The release notes for Firefox 3.6.2 can be found here .

We’ve already shared some of the basics about how to use Facebook’s privacy settings to keep your personal updates, well, personal. Now it’s time for some more advanced techniques using the newer features Facebook implemented only a couple of months ago. If you have a lot of Facebook friends, you probably have some work friends, some family, and other groups in the mix

This post is part of Mashable’s Spark of Genius series, which highlights a unique feature of startups. If you would like to have your startup considered for inclusion, please see the details here .

For those of you waiting for the Facebook integration on the PS3 to roll out, the new version 3.10 firmware is now available. You’ll have to install the update, then look for the new Facebook Settings under the Account Management section of the PlayStation Network area of the cross-media bar (XMB). Once enabled you’ll be able to toggle your settings for the three areas we described earlier : send updates from trophies, PSN purchases and/or “game events” to be determined by developers.

Back in June, popular Twitter desktop app TweetDeck made a splash when it launched its iPhone app . It was significant, as it was the first Twitter iPhone app to integrate with a desktop version and it provided a very real challenger to the Tweetie iPhone app.

As you may know, Facebook rolled out its planned new feature that lets you “tag” other users in your status updates earlier today. It’s very similar functionality to @replies on Twitter, and most folks will be pretty familiar with how it works and why you’d want to use it. Still, there are some differences to note, and some may appreciate a basic walkthough of how the new feature works.

As we mentioned earlier this week, Google is set to launch a new , updated version of its search engine – the update is being called Google Caffeine . These changes to the service’s infrastructure will change the search results on Google in a more noticeable way than the usual incremental changes, so website owners are paying attention.