I posted a review in the Google Play Store, and received a Developer response asking me to post the review here, in order for the problem to be addressed. Here is the review: I'm really frustrated. I have used, and loved Firefox for many years. I'm a prolific reader, and borrow e books from the library to read on Kindle. Suddenly, this does not work with Firefox anymore, no matter what suggested fix I attempt. I hate the idea of being forced to use Chrome, but that is the only workaround I can find. There are important reasons many of us want to use Firefox over Chrome. Firefox, please fix this!!!