I sense a disturbance in the force...
Bugs! The bane to any programmer, they make us all shiver with fear brrr!. However, I see them as an initiation into jedihood. The more you overcome, the more robust you get. How then do you go around squashing those buggers?
Another beauty of this tool is that it comes with a pane to check how responsive your site is. This checks if your site scales on various devices from a ginormous Mac to a Nexus. That in itself is life-changing. This means you do not have to have a bunk full of computers of various sizes to check for responsiveness of your site.
I know, it is seems as something that decended from the above, but, in the right hands, it can be a very powerful tool. So, get the right hands.
May the code be ever in your favor.