[proexploit]

I'm not sure I consider that to be true. Why is pixel perfection out-dated?

[vladharbuz]

Perhaps because rigid constraints are useless with the number of different devices out today, and layouts should instead be highly adaptive?

[dubcanada]

No that's wrong. The screenshots are not based on one device looking like another. It's based on one device looking like X all the time.

For example this uses Firefox, if all I change is something in the backend. My front end should look the exact same before the change and after.