I've upgrade my Google PageRank extension for Firefox. At first, I found it ugly as the word
PageRank is now abbreviated as
PR. But then, I found that if a page is found to be categorized in the Google Directory, a little icon will appear next to the text
PR:. As before, mousing over the PageRank status bar item shows a tooltip of the Google Directory. But in this new version, what's more is that clicking on the item will give you to that Google Directory... Cool!
Try visiting mozilla.org with the extension installed. Clicking on it will open a new tab of Computers > Software > Internet > Clients > WWW > Browsers > Mozilla!