Browser compatibility is their choice. Their compatible browsers are: *'''''Browsers''''': http://learnline.cdu.edu.au/support/learnline/systemrequirements.html#browsers Also, be sure your system meets all of the other requirements and that you have all plugins installed. *'''''System requirements''''': http://learnline.cdu.edu.au/support/learnline/systemrequirements.html You can install Firefox Portable version to use only on that site and use your installed current Firefox version for everything else. Firefox Portable is not produced by Mozilla (but is based on Firefox released versions) and is not supported on this site -- has its own support forum (see below). Firefox Portable installs in a separate folder on your hard drive so that it does not interfere with your currently installed Firefox version settings or personal information (bookmarks, passwords, etc.). You can also install Firefox Portable on a USB/thumb/pin/jump drive. *Firefox Portable general information: http://portableapps.com/apps/internet/firefox_portable *Firefox Portable 3.6.23 download links: http://portableapps.com/apps/internet/firefox_portable/localization#legacy36 *Firefox Portable user forum: http://portableapps.com/forums/support/firefox_portable '''If this reply solves your problem, please click "Solved It" next to this reply when <u>signed-in</u> to the forum.''' ------------------------- Not related to your question, but... You may need to update some plug-ins. Check your plug-ins and update as necessary: *Plug-in check: https://www-trunk.stage.mozilla.com/en-US/plugincheck/ *Adobe Shockwave for Director Netscape plug-in: [https://support.mozilla.com/en-US/kb/Using%20the%20Shockwave%20plugin%20with%20Firefox#w_installing-shockwave Installing ('''''or Updating''''') the Shockwave plugin with Firefox] *Adobe PDF Plug-In For Firefox and Netscape: [https://support.mozilla.com/en-US/kb/Using%20the%20Adobe%20Reader%20plugin%20with%20Firefox#w_installing-and-updating-adobe-reader Installing/Updating Adobe Reader in Firefox] *Shockwave Flash (Adobe Flash or Flash): [https://support.mozilla.com/en-US/kb/Managing%20the%20Flash%20plugin#w_updating-flash Updating Flash in Firefox] *Next Generation Java Plug-in for Mozilla browsers: [https://support.mozilla.com/en-US/kb/Using%20the%20Java%20plugin%20with%20Firefox#w_installing-or-updating-java Installing or Updating Java in Firefox]