One of the great things about Firefox is the ability to add functionality through extensions. I just wanted to highlight a few of my favorites.

FaviconizeTab
I recently discovered this one via Geek in Heels and love it. I always have Gmail, Facebook, Google Reader, and Flickr up, so this really helps to reduce clutter in my tabs.

Web Developer
I downloaded this one years ago and it still proves useful. It provides a toolbar that lets you do things such as disable javascript, remove CSS, highlight images, resize the browser window, etc., which are all useful when working on websites. You can see it in the above screenshot, as well.

WiseStamp
This is a neat one that appends a signature to my outgoing email. It works with a variety of web-based email clients, such as Gmail, and allows you to include links to all your social media profiles, as well as your RSS feed. So, my signature currently looks like this:

For the Firefox users out there, what are your favorite extensions?