After downloading Bugaboo from iTunes Store you can follow these steps to use the helpful tool:
First of all your iOS device and your computer have to be connected to the same Wifi network. This is a must.
If you’re in one network start Bugaboo on your iOS device and browse to the website you want to debug. Now tap on the little wifi icon inside Bugaboo in the toolbar on bottom side.
For more information you can find two videos on youtube that show you bugaboo in action:
Bugaboo in Depth: