Interesting service. Couple of small issues:

#1. http://usefirefly.com/learn-more (Our script tag will add a support button to the right side of every page it is installed on.) … but the image shows it on the left side

#2. http://usefirefly.com/pricing says ie9+ and http://usefirefly.com/learn-more says ie8+ under highlights. Which one is it?

#3. I don't understand why you use requirejs to load your js. This causes 2+ hits and a larger download. Instead, you should be wrapping it with almond for less overhead. While you are at it, how about also async loading your js too.