Simple, and does exactly what its supposed to. Rated 5 out of 5 stars

I wanted something that wasnt resource heavy, and something i could highlight a bitcoin address, and right click and find the price. It does exactly that.
After highlighting the bitcoin address, right click and choose "Blockchain Lookup". A new tab will popup with that bitcoin addresseses information via Blockchain.info.

If you have a popup blocker, you might have to allow the popup thru from time to time.