Is firebug lite javascript must need in Sitecore shell?

Is Firebug lite must needed in Sitecore shell? What is the use of this for content authors?

http://alexeyrusakov.com/sitecoreblog/CommentView,guid,6704bf3d-8980-4f29-9ac2-125cff64bb80.aspx

You can safely remove the firebuglite script from the shell.

To do so, open the Core database and navigate to

/sitecore/layout/Devices/Internet Explorer

and delete the Firebug Lite item.

Firebug lite is included automatically with the Sitecore editor. Simply press F12 to bring it up within the context of the window you are working in.

It really has no benefit for the content author. As Adam said, it's main benefit is for developers working on changes to the shell.

Firebug lite can be run from a bookmarklet, rather than having it load on each page.

http://getfirebug.com/firebuglite

As it's a javascript debugger, you'll only need it if you're editing js in the shell - eg SheerUI apps, custom fields etc.