"Facebook have clearly entered into whitelisting agreements with certain companies, which meant that after the platform changes in 2014/15 they maintained full access to friends data", the committee said in a statement.
The British Parliament on Wednesday released a trove of Facebook documents, which it took possession of amid a larger inquiry into Cambridge Analytica, a firm that used Facebook data to profile users for political purposes.
The UK has released a 250 page document containing private emails from Facebook, including communiques from Mark Zuckerberg himself.
The developer, Six4Three, co-founded by Ted Kramer, built an app called Pikinis that could find pictures of friends wearing bikinis in their Facebook photos. "Key points: 1/ Find out what other apps like Refresh are out that we don't want to share data with and figure out if they spend on [advertising]", he wrote on September 18, 2013, to Ime Archibong, Facebook's director of product partnerships.
Facebook is also seen as aloof in worrying about leaked user data, even now as the social media giant moves to block access to such data.
Facebook's director of developer platforms and programs Konstantinos Papamiltiadis told AFP last week that the company "has never sold anyone's data".
The summary said the documents also show Facebook knew that an update to its Android mobile app phone system - which enabled the Facebook app to collect user call logs - would be controversial.
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This is an ultrasonic in-display fingerprint reader that Qualcomm says will read your fingerprint even if its wet or oily. For example, Verizon announced yesterday that Samsung will release a 5G smartphone in the first half of 2019.
In a response posted on its blog, Facebook said that whitelists are a common part of testing new features with a limited group of partners before a broader rollout.
Executives also seemed concerned that simply enabling Facebook logins and data access for potentially competing platforms could ultimately cannibalize user activity on Facebook itself.
Parliament's media committee accused Facebook on Wednesday of cutting special deals with some app developers to give them more access to data, while icing out others that it viewed as potential rivals. Zuckerberg mentioned companies like Path and Pinterest, rival social networks that could use the developer access to run it out of business. "However, that may be good for the world but it's not good for us unless people also share back to Facebook and that content increases the value of our network".
The committee's seizure of the documents, which were under seal by a court in the United States, came after the CEO of Six4Three, Theodore Kramer, was threatened with arrest while on a business trip to London if he didn't hand over the material.
Onavo offered a series of apps that let people monitor their data use and protect themselves from malware and threats. "There are a small number of developers whom no amount of sharing to Facebook or monetary value can justify giving them access to Platform".
This isn't the first time Facebook has been in hot water for dodgy practises - in fact, it's becoming a recurring theme ever since details of the Cambridge Analytica scandal emerged early this year, but the newly-released emails provide a level of detail that's far more candid than anything previously uncovered. According to Bloomberg, the California courts sealed the emails, but the United Kingdom compelled the Six4Three founder to hand over a laptop containing the emails, which were acquired during discovery, when the founder visited London. A subsequent email suggests users wouldn't need to be prompted to give permission for this feature to be activated.