It takes those pages from Google Search History. It’s a service by Google that is recording the web activities of a logged in user. To be honest I have no idea how the random pages are fetched only that they are not necessarily the pages that you visited previously. A quick test with the test search lead to Engadget, BoingBoing and Youtube.

The random site add-on is powered by a small button that has to be moved to one of the Firefox toolbars. This is done with a right-click on blank space of a toolbar and the selection of Customize from the menu.

Once the button has been dragged and dropped to the toolbar it can be used to load a random page in the active tab. If the user is not logged into his Google account he will be prompted to do so after the first start.

This function looks pretty similar to the stumble button of the Stumbleupon toolbar but it is definitely an interesting option as it launches websites that have not been previously visited by the user. If anyone knows additional details about how the websites are selected then let us know in the comments.

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