(CNN) -- Savvy Internet users know that all the great stuff they get from the Internet us for "free"—the searches, the social networks, the games, even the news—isn't really free. It's an exchange, where companies are able to take user data, sell it to advertisers, and make money that allows them to give themselves a paycheck while keeping you afloat in free digital services. So that data you're giving away online is worth something, but have you ever taken a stab at figuring out how much? A just-released privacy add-on for Firefox and Chrome, Privacyfix, gives it the old college try. Both Congress and the executive branch have been talking more about online privacy in the past couple years.
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New add-on attempts to measure the value of your data to websites
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Facebook, Google and other sites make their money using data for advertising
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Privacyfix works with Firefox and Chrome Web browsers
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Creator says his yearly value is $1.68 to Facebook, but $700 to Google
The add-on links you directly to those Facebook settings so you can fix them immediately, navigating you through a maze of privacy options some find arcane; it has a similar function for @placeholder.