Right click on selected text to be given an option to look up the stock.
Select some text, right click, click on "Search for Stock" and done! A new tab will open with the Google Finance page info of the highlighted stock. Great for quickly viewing the stock price and chart for a given company.
I developed this extension because I read a lot of news articles on stocks and thought "I wonder how this stock has been doing". Selecting, copying, opening a new tab, and pasting got to be too much of a chore. This cuts my stock lookup time in half!