If you have applied the “Microsoft .NET Framework 3.5 Service Pack 1” update, you may be surprised (and justifiably pissed) to find out that this update included a new extension being very quietly added to Firefox without your knowledge.

It’s called the “Microsoft .NET Framework Assistant (ClickOnce) Firefox Extension” and according to Annoyances.org, it gives Firefox a vulnerability that has plagued IE from the start.  An alleged “Feature” that allows websites to install software on your computer without your knowledge or consent.

As if there weren’t enough problems with “drive by downloads”!

To add insult to injury, the boys in Redmond disabled the “uninstall” button on the extension and have apparently tried to make it very difficult to remove without screwing up your system.  Fortunately, the folks at Annoyances.org have put together a very easy to follow set of instructions that guide you step by step through the process of removing the offending plugin.  Click here for instructions to remove that extension.

Technorati Tags: evil plugin, firefox plugin, drive by download, uninstall plugin, unwanted plugin, dot net update, microsoft, annoyance

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