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Netflix Facebook sharing tool debuts

Kevin Spacey and Robin Wright star in the exclusively-on-Netflix series “House of Cards.”

Netflix via Associated Press

Kevin Spacey and Robin Wright star in the exclusively-on-Netflix series “House of Cards.”

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A long-awaited coming attraction has arrived for Netflix’s US subscribers: being able to automatically see what their Facebook friends have been watching on the Internet video service — as long as they are willing to open a peephole into their own viewing habits. The sharing tool, announced Wednesday, is rolling out 18 months after Netflix introduced it abroad. Investors apparently think the feature will increase Netflix’s popularity and, by extension, its profits.

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