Educational

In 2015, Facebook removed a feature that had been in place for some years that allowed developers to access information about Friends who had also signed up for their app. During that time, about 270,000 people downloaded and installed an app that was portrayed as part of an online personality quiz

In June 2015, the Belgian data protection regulator, Commission for the Protection of Privacy, launched a complaint that Facebook indiscriminately tracked internet users when they visited Facebook pages or clicked Like or Share, even when they are not Facebook members. In November 2015, the Court of

In January 2013, Facebook upgraded its search tool to enable the site to answer more complex questions. Called Graph Search, the new tool aimed to make it possible for users to find businesses and each other based on location, personal history, personal interests, and mutual friends. The site

In 2015, Facebook created the "Free Basics" programme, in which the company partnered with telephone carriers in various countries to offer free access to Facebook - that is, using Facebook would not count against their data plan. While critics argued the plan is anti-competitive, violates the

Nearly 700,000 Facebook users were subjects of a research study where researchers changed randomly selected users' newsfeeds to be more positive or negative to study whether those users then displayed a more positive or negative affect in response. The experiment showed the power of Facebook's control over the News Feed and the algorithms that determine which of the possible pieces of content shows up at the top at any given moment.

In 2012, Facebook CEO Mark Zuckerberg's sister, Randi, tweeted to fellow Twitter user Callie Schweitzer that Schweitzer had violated her privacy by posting a picture taken in her kitchen. Randi Zuckerberg, the former head of Facebook's marketing department, had posted the picture, which was taken in

In November 2011, the US Federal Trade Commission charged Facebook with repeatedly breaking the privacy promises it made to users. Among the list of deceptive practices and incidents in the FTC's complaint were December 2009 changes Facebook made to its site that publicly exposed information users

In June 2011, Facebook enabled an automatic facial recognition called "Tag Suggestions" based on its research project DeepFace, requiring users who objected to opt out. The feature scanned the faces in newly uploaded photographs and compared them to those in the billions of images already on the

In early 2011, Facebook launched "Sponsored Stories", an advertising product that used content from members' posts inside ads displayed on the service. Drawing on Likes, check-ins, and comments, a Sponsored Story might use a member's photograph and their comments from a coffee shop to create an ad

In October 2010, the Wall Street Journal discovered that apps on Facebook were sending identifying information such as the names of users and their Friends to myriad third-party app advertising and internet tracking companies. All of the ten most popular Facebook apps, including Zynga's FarmVille

When journalist Alex Hern needed to set up a Facebook account in order to manage the Guardian's technology page and other work-related things, he locked down its privacy settings so that the account's profile would not appear in searches and only Friends of Friends could add him as a friend. In

In April 2010, Facebook launched a set of tools to enable websites to add a social layer by adding a Facebook frame to their pages. The company's three launch partners, Microsoft's Docs.com, Yelp, and Pandora, had access to a more comprehensive tool, Instant Personalization, which allowed them to

In July 2009 after an in-depth study of the site spurred by complaints from the Canadian Internet Policy and Public Interest Clinic at the University of Ottawa, Canada's Privacy Commissioner issued a ruling that Facebook was in direct violation of the country's privacy laws. Among the regulator's

In September 2007, Facebook, which from its 2004 founding had stressed the privacy of its user profiles and interactions, opened up its profiles to public search engines such as Google and Bing. Facebook's new "public listing search" allowed anyone to search for a particular person; such searches

In May 2009, University of Cambridge computer science researcher Joseph Bonneau discovered as part of his research that many social network respond to user requests to delete photographs by hiding them while remaining them on their servers. Among the worst offenders were Facebook, MySpace, Bebo, and

In February 2008, users discovered that deleting their account from Facebook does not entirely remove it. Instead, the company's servers retained copies of the information in those accounts indefinitely even after those users telephoned the company to request full removal. The company argued that