Firefox only (Windows/Mac/Linux): Firefox extension The Camelizer adds a small button to online retailers Amazon, Newegg, and Best Buy that, when clicked, displays price history charts and item watch features to help you make a smart buy. (Click the image above for a closer look.) Once you've installed the experimental extension (the experimental part means you'll have to tick a checkbox agreeing that it could be unstable before you can install it), just start doing your normal shopping around on Amazon, Newegg, or Best Buy. You'll notice a small Camel button strip on the left of your browser. To bring up Camelizer's price history charts, just click the Camel button. As you can see in the screenshot above, on Amazon Camelizer compares Amazon's price history with third party new and used prices. - lebaron