Cool Firefox Extensions by Ann Smarty

Ann Smarty, one of the author in Search Engine Journal...
One of the recent posts by Ann Smarty is 5 Tools to Visualize Page Outlinking Tactics
Very good one..tools for firefox.. all of them are good...

But i really liked the web developer firefox extension... it is really cool....
For example in below screenshot, i have displayed the image alt attribute using the web developer tool....

Google Chrome - Browser from Google

A browser from Google.. in beta.. I have downloaded and installed it...

simple look and feel...
no title bar instead tabs are there... (like firefox tabs)
clear the browsed data (not browsing isn't it) feature is like firefox

Cool to use... frequent use would give more idea/feedback on this..