This is the comment I received from wal-mart when i asked why firefox isn't supported. Thank you for contacting us at mediadownloads.walmart.com. Your comments and questions are very important to us as we strive to meet your needs. Thank you for taking the time and writing to us that the Walmart video download site is not compatible with the Firefox browser. I apologize for the inconvenience caused. We have forwarded your feedback to our Research and Development team which is already working in this regard. I once again thank you for your valuable feedback which will help us improve our services. Sincerely, Suzanna Customer Service at WalMart.com