Facebook has filed a suit against two Ukrainian developers for creating Facebook apps and browser extensions that harvested user data and injected ads into users' timelines.

The two developers cited in a lawsuit Facebook filed late Friday, March 8, are named Gleb Sluchevsky and Andrey Gorbachov, both based out of Kiev, and working for a company called the Web Sun Group.

According to court documents, Sluchevsky and Gorbachov ran at least four web apps that provided quizzes on various topics.

The web apps were advertised and shared on Facebook but they were hosted on a multitude of third-party websites such as megatest.online, supertest.name, testsuper.su, testsuper.net, fquiz.com, and funnytest.pro.

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