How do I change settings in QuickTime 10? I'm trying to follow these instructions on configuring QuickTime so I can use a browser-based web app that uses QuickTime as a plugin in FireFox: http://tones.wolfram.com/tsfaqs/osx/configurequicktime.html

I'm using QuickTime Player version 10.4 (833.1). The instructions I'm reading clearly indicate that QuickTime Player should have a Preferences option in its menu bar, as shown in this picture:



However, my version of QuickTime Player does not seem to have any preferences whatsoever:



How do I change QuickTime settings using QuickTime Player 10.4?
For that website you need the legacy version of QuickTime player. It is called QuickTime player 7 and is located in your /Applications/Utility folder.

If it is not there get it from Apple.