The bug described in https://bugs.webkit.org/show_bug.cgi?id=231167 was fixed in
Safari 16. The workaround for Safari <= 15 is triggering an error in VitalSource
LMS assignments [1]. Fix the issue for Safari >= 16 by disabling the workaround
in browsers where it is not required.

[1] https://github.com/hypothesis/support/issues/161#issuecomment-2407558020