Not to be verbose - I am really disappointed. Why? Because I was unable to use this hopefully excellent tool with my current development project.
The reason is that pi.js library used in the current release of Firebug Lite extends native JavaScript objects like String, Number, Array and so on. And some of the methods introduced in the library collide with overridings used in my project.
Yes, I know that it is not good idea to extend native JavaScript objects.
But main idea of the post is that while I think that any given application written for specific customer and specific environment CAN AFFORD to use such technique, but debugging tool that is supposed to be absolutely sandboxed and unobtrusive for its hosting environment can't be granted such privileges.
So I am totally disappointed by such design and hope it will be fixed in the subsequent release.