Question

The "Launch Application" dialog behaves as if it's in the background not responding on 1st appearance, when I click on a button it goes in the background

When I click on a magnet link, the Launch Application dialog/window appears, but when I click OK, it's as if its not there at all, as if I clicked outside the dialog so it goes in the background, requiring me to switch to that dialog again and only then does it respond to the click (OK or Cancel, whichever). This is on Firefox 19/Windows 7 x64, didnt use to happen before.