Rated 1 out of 5 stars

Using Firefox 2.0.0.17. Default install, hxxp links don't work, pops up usual message window:

"Firefox doesn't know how to open this address..."

This review is for a previous version of the add-on (1.6.0.2). 

I've just tried on firefox 2.0.0.17 on Windows XP and it does seem to work. Are you sure you didn't disabled it? Check if the icon on the statusbar is red-crossed or if it isn't right-click on it and select "QuietUrl Options..." and check if you see the two default rules.
I reccomend you to watch the video tutorial on the website (quieturl.com) and also please use the bug-report feature on the same website in the future as I don't get informed by mozilla when these reviews are uploaded and these reviews are also moderated (so they're slower). It happened just by chance that I checked in the page.