I've looked at the Chrome DevTolls, looks exciting but a little overwhelming. I do sketch everything before designing actually. What I'm trying to take on is usually not done by one person that's why I'm trying to see what my priorities are right now. So when I was looking through all the stuff (vagualy ) I found this: "Unsafe JavaScript attempt to access frame with URL NIKOXXII.com from frame with URL YouTube. Domains, protocols and ports must match." personally I think its nothing important, it probably just states... :"wait a minute, where did this come from?" yeah, well I think I need to learn a little more to understand what the tool does exactly, have you used it and how does it help you?