This extension illustrates, via colour highlights, the extent of a price drop on Amazon.ca and Amazon.com.
The extension works in the background and requires no user intervention. The extension is always on and alters the default price change alert box as the page loads. To turn it off, go to chrome://extensions and uncheck “Enabled” next to the title of the extension.
Amazon Price Drop Percentage is not an official extension from Amazon.com, Inc.