Well, maybe this is my fault or i simply struggle to find this out in the 3.0.0, but can you explain me the following:
With 2.0.6 we have the very useful interface to inspect/debug Ajax calls from a particular page.
Directly within the Firebug's Console tab we are able to see the request/responce headers, params and responce body and even the formatted JSON responces in a very handy way, just like this:

All this directly via the Console tab - for me it is a priceless functionality.
Now, with 3.0.0 it seems impossible and we are forced to switch to the Network tab, only to see all this in the far right.
When you click on the appropriate request within the console tab, you end up with something completely unusable in a pop-up window:

To be honest, i can not understand this - no well formated params, no human readable JSON responce - in fact - this are the normal FF developer tools.
Who needs this change?
In the blog you say the purpose of the 3.x is to complement FF's developers tools with a missing functionality.
Instead - i can see the lack of the most useful feature (personally to me, of course)
Will be glad to see it right back, if possible