Update lib/browser_launcher.js
Update lib/browser_launcher.js

Copied FireFox's "Make Default Browser" bug fix from the darwin platform to the Windows platform.
testem/testem,johanneswuerbach/testem,paulot/testem,testem/testem,johanneswuerbach/testem,Addepar/testem,johanneswuerbach/testem,fotinakis/testem,testem/testem,paulot/testem,bradleylandis/testem,Addepar/testem,fotinakis/testem,paulot/testem,Addepar/testem,Addepar/testem,bradleylandis/testem,bradleylandis/testem,fotinakis/testem