They are insane if they require you to go back to a browser from 2006-2008. That's going to expose you to major security problems. Perhaps you should demand your money back! Do you know whether you can install two Firefox versions on Mac and only use the old one for Princeton while still using a new version for everything else? Hopefully someone can chime in on that. You would get the old version here: ftp://ftp.mozilla.org/pub/mozilla.org/firefox/releases/2.0.0.20/mac/en-US/ IMPORTANT: Before installing an old version, make sure to back up your profile folder. Newer profile folders are very incompatible with old versions of Firefox and you could corrupt your bookmarks, etc. See [https://support.mozilla.com/en-US/kb/Backing+up+your+information Backing up your information]. (You can copy your entire Firefox profile folder somewhere outside of the Mozilla folder.)