emblur

emblur.uc.js

// ==UserScript==
// @name    emblur
// @desc    Unfocuses <embed>/<object> on focus.
// @help    Hold shift/ctrl to turn off temporarily.
// @include main
// @author  satyr
// @license X
// ==/UserScript==
function emblur(e){
  switch(e.type){
    case 'keydown': case 'keyup':
    return emblur.off = e.shiftKey || e.ctrlKey;
  }
  if(emblur.off || emblur.ignore.test(e.target.tagName)) return;
  clearTimeout(emblur.tim);
  emblur.tim = setTimeout(
    function _emblur(lm) lm && lm.blur(), 500, e.target);
}
emblur.ignore = /^(?!embed$|object$)/i;
let(c = document.getElementById('content')){
  for each(let type in ['focus', 'keydown', 'keyup'])
    c.addEventListener(type, emblur, type === 'focus');
}