Rated 5 out of 5 stars
This might be one of the single greatest addons available!!!
"load URLs, do a web search of selected text on a page"
Can you see the ability to ... highlight any word on a web-page/ you enter in a text-box, then to SIMPLY drag it a few pixels to the side and do a Google search on it OR open an non-linked web-page !?!?!?!?
I contently find myself use other peoples Firefox and being utterly frustrated that I cannot do a Google search by dragging it LOL ... oh did i mention using this to quick spell-check!