Core Services released the debugger Companion.JS, which supports, in addition to extended error messages (call stack and the real name of the file where the error occurred), “Firebug” is a similar Console API.
In combination with the main product (DebugBar), this is a good replacement for Firebug, especially considering the "bezrybe" in this issue ...
Materials:
The article
"Companion.JS is a companion of a web developer who is on his way with IE"Download link:
www.my-debugbar.com/wiki/uploads/CompanionJS/install.exeInstallation Description Page:
www.my-debugbar.com/wiki/CompanionJS/InstallingInterface Screenshots:


Supported Console API commands:
- console.log (object [, object, ...])
- console.debug (object [, object, ...])
- console.info (object [, object, ...])
- console.warn (object [, object, ...])
- console.error (object [, object, ...])
- console.dirxml (node)
- console.time (name)
- console.timeEnd (name)