Watch QuickTime videos in the browser?

Odd... Works for me!

I'm using the totem plugin which I thought shipped with Ubuntu. Have a look at about:plugins in the browser and see if you can see "QuickTime Plug-in 7.something"

If you don't, check totem-mozilla is installed. Might be worth installing the ubuntu-restricted-extras package to make sure you've got the right codecs.

Just searching synaptic, I also have libquicktime1 installed. It's a dependency of quicktime-utils so it might be worth installing that. It might just be something used for encoding to quicktime.

Edit: you might also need gstreamer-plugins-bad for AAC audio.

The Quicktime codec, like most other non-free formats, is provided as part of the w32codecs package (or its 64-bit equivalent, w64codecs) by Medibuntu. The community documentation includes instructions for installing.

Once the codecs are installed the standard media plugins for your browser should detect and handle them.