Summary: Enable window.event which can access dispatching event from everywhere.


Link to standard:

Platform coverage: All

Estimated or target release: 65

DevTools bug: (not sure)

Do other browser engines implement this?

(I think so, but I'm not sure because of not my fix.)

Enabling patch has been landed from:
because we need to manage those changes as a set.

This was disabled temporarily due to a lot of web apps assume that window.event is available only in IE, and IE stores a Unicode code point in keyCode of "keypress" event. Google Chrome and Edge followed same behavior for both, so, such apps work even with them.

This is now fixed by the both fixes of:!topic/!topic/

Masayuki Nakano <>
Software Engineer, Mozilla
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