I just came to know about this extension from my team mate, and its just amazing to look at the various things that this particular extension provides with respect to
- Fine tuning the CSS
- Correcting the HTML
- Monitoring the time elapsed while rendering
But thanks to Firebug, it does make most of our development work simpler and faster.. Ooooh.. :)
Here is a screen shot for the Net tab (network monitoring) of Firebug, for the Reddit site.