3 ms·

Huh? Extension can override JavaScript on the page, too, you know: window.adContentsVisible = function () { return true; }

• Myrth 14y ago
  (function() { // local scope, can't override })(); My point is that I agree with grandparent, that they just allow ads to be shown, and it's not technically impossible to reload ads, or prevent page contents view, if no ads visible.
  • oinksoft 14y ago
    The plugin can absolutely mock the ad element(s) and make them seem to be visible.
  • comex 14y ago
    only because sites generally don't do so; if necessary, extensions could get much more aggressive with website scripts, current user script limitations aside.