Where do I download the Firefox web browser? Med-Challenger Support January 30, 2017 22:33 Updated Follow Download Firefox at www.firefox.com. If you have additional questions or experience any difficulties, please submit our support form or contact us by phone at 1-888-242-5536. We offer free, live, US-based support Mon – Fri, 8am – 5pm CT. Comments 0 comments Article is closed for comments.