Sure it does. The moment I saw headlines like "US government recommends against using Internet Explorer" because of that bug, I thought "Chrome and Mozilla guys must be over-joyous with this". Google already promised enterprises that they'd support XP a year longer than Microsoft, for Chrome. This made it even easier to convince them to switch to Chrome. And I don't think Mozilla plans on ending XP support anytime soon either. I think they only ended Windows 98 support a few years ago.