CloudFront rule not working with FF 22.0
FireFox: 22.0 HTTPS Everywhere: 4.0development.8 (also 3.2.4)
Just upgraded to FF 22.0 and had trouble on Amazon's MP3 site. After much poking around I found that I had to disable the Cloudfront rule in order to play MP3 samples.
Try to play the MP3 sample; it will not play. Disable the Cloudfront ruleset and the sample will play fine.