If you're like me and use firefox with a trackpoint (i.e. no scroll "buttons"), you're probably also happy with these settings:

middlemouse.paste=true

This adds pasting from the x clipboard.

middlemouse.contentLoadURL=false

Do not try to load website from content in clipboard.

general.autoScroll=true

Enable scrolling using the middle mouse button.

Now firefox behaves similar to conkeror, which is my default browser currently.