Also, none of this stuff should ever be used in production code, only during development (at least IMHO). So even if some things were browser specific, it shouldn't hurt anyone but yourself if you run into incompatibilities while using any of it.

Is there any web standard mandating support of console API?

console.table doesn't work in IE6

DON'T YOU FEEL STUPID NOW?!

Awesome, glad that's the case. Guess I have to hold my breath for a future where technologists stop putting their knowledge behind paywalls then.