Well, at first I wasn't making it work.
And just now I did, accidentally.
But I do show that it works in FF28.
And SeaMonkey 2.26a2, Aurora.
With SeaMonkey you get a beep.
With FF, not.
It does not work on a about:newtab, about: ... type of "page", but maybe that's to be expected.
Oh, wait... FF had NoScript 2.6.8.11rc4 in it...
But I still see it working in FF28 with NoScript 2.6.8.18rc1.
And just now I did, accidentally.
But I do show that it works in FF28.
And SeaMonkey 2.26a2, Aurora.
With SeaMonkey you get a beep.
With FF, not.
It does not work on a about:newtab, about: ... type of "page", but maybe that's to be expected.
Oh, wait... FF had NoScript 2.6.8.11rc4 in it...
But I still see it working in FF28 with NoScript 2.6.8.18rc1.