BGChanger is a Chrome add-on that allows users to change the background colors of specific websites. By specifying the desired URL and CSS in the options menu, users can customize the background of the specified URLs according to their preferences. Multiple URLs can be specified by separating them with a comma, and up to a maximum of five settings are supported.

To use BGChanger, simply right-click on the extension details page or the icon in the top-right corner of the Chrome screen and select "Options" to open the options menu. From there, users can specify the URLs they want to match and the corresponding CSS to change the background color.

With its simple and straightforward functionality, BGChanger provides a convenient way for users to personalize their browsing experience by customizing the background colors of their favorite websites.