Firefox Extensions
I don't use any of the extensions that are available for the Firefox browser, and I just didn't care for the Google toolbar for Firefox. However, there are two extensions that I do use. One is SEOpen (www.seopen.com), which adds a bunch of search engine optimization tools for examing websites. The other is a PageRank tool for Firefox which displays a site's PR value in the lower right corner of your FF brower. That PageRank Extension can be found at Tapouillo.com, which is some French web developer's site. I added these sites to my favorites because I love using both of these extensions, especially SEOpen.