I was just in touch with Stripe support, and they confirmed that Firefox is no longer a supported browser. That means that issues that can only be reproduced on Firefox will no longer be fixed.
Obviously, Firefox's market share isn't what it used to be. However, Stripe has always cultivated an image of being developer-friendly, and Firefox remains popular with developers. Is not supporting Firefox a reasonable position for Stripe (and other sites popular with developers) to take?
Discuss.