Re: Zombie hard disk
"a user interface element can't be clicked or keyed when it has only just appeared on the screen"
This exists. When installing extensions in Firefox, the install window needs focus for a couple of seconds before the "Install" button will activate. Until then it sits there greyed out - just long enough so you can't accidentally click to install malicious software, but not quite long enough to annoy you. Very well designed, but nobody else seems to have copied them.