It's not supposed to be used everywhere.

It's a developer tool for browsers that have the requisite developer tools support.

Works also in Firefox with Firebug (but not yet in native Firefox console). See [1] for a blog entry from Jan Odvarko.

[1] http://www.softwareishard.com/blog/firebug/firebug-tip-style...

This "console"... IE5 didn't even have console... and event the current one IE haves is a joke compared to firefox or chrome.

I think parent is referring to the bad old days of browser specific sites.

The features of the console is not really a usability issue.