Works for me on FF 27 Rated 5 out of 5 stars

I always forget to buy things through Amazon's "Smile" program-- this add-on automatically redirects me to the Smile program affiliate page any time I go to Amazon.com which is exactly what I needed.

For those having problems, I used "http://www.amazon.com" (without the quotes) as the Example URL and Include Pattern and "http://smile.amazon.com/" (without the quotes) as the Redirect To URL, selected Wildcard as the Pattern Type, and left Unescape and Escape Matches unchecked.

This review is for a previous version of the add-on (2.8.1.1-signed).