As social network apps become increasingly popular, many people start to concern about their privacy on the Internet.

随着社交网络应用越来越受欢迎，许多人开始担心他们在互联网上的隐私。

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Revelations about the social widgets come amid growing concern about the privacy of Internet and smartphone users.

WSJ: 'Like' Button Follows Web Users

As concern over Internet advertising and data collection grows, privacy advocates and the Internet advertising industry have been sharpening their legal knives for more than a year.

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