No Change in GReader after extension install in FF3

i installed the googlereader firefox extension and all i see is a drop down menu for all/good/great/best and nothing else new in google reader. Am I missing something? I am using Firefox 3. I don't remember explicitly installing Greasemonkey but I don't know how to tell if it is installed or not. I am very frustrated as this extension looks like the kind that I would love and want to share with many people, but I am close to giving up on it. Help?
 
sad I’m frustrated
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