Web Upon has a great post listing off 10 “killer” Firefox extensions that you probably don’t know about. It’s a great list and one that’s made up of about 8 extensions I already have. If you run Firefox and you love sleek, well-designed productivity then I highly suggest you check it out and get some of these on your computer.

I will personally attest to the awesomeness that is Piclens. It’s a beautiful and refreshingly efficient way to nagivate through photos on websites like Flickr, Myspace and Facebook. I showed it to a sales rep here at SXSW who’s demoing Microsoft’s Silverlight and he just about fell out of his chair. You can download it HERE.

Thanks Web Upon. We love lists like these!