NEWL is an AP-like language exam endorsed by the College Board, https://www.americancouncils.org/national-examinations-world-languages-newl Its computer setup instructions https://exams.actesting.org/docs/NEWL_Practice_Setup.pdf mention that Safari is not supported, there is a UA check when trying to take the exam, and indeed, even with UA spoofing browser check does fail. The reason for the failure is that this works in Chrome and Firefox, but not in Safari: navigator.getUserMedia = ( navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia || navigator.msGetUserMedia); We are the only ones who have completely removed getUserMedia from navigator - Firefox still has navigator.mozGetUserMedia, and Chrome has both navigator.getUserMedia and navigator.webkitGetUserMedia.