It looks like part of the problem with #4 is this issue as well.
It is not possible to detect a '?' being pressed using the keydown event in Firefox on Mac OS X. See the key handler source in the google closure code; in particular, this comment:
// On the Mac, shift-/ triggers a question mark char code and no key code
It looks like part of the problem with #4 is this issue as well.
It is not possible to detect a '?' being pressed using the keydown event in Firefox on Mac OS X. See the key handler source in the google closure code; in particular, this comment: