For the context, ’listing as an extremist organisation’ is just a euphemism for forbidding a government-opposing group of people and harassing them individually

For the context, ’listing as an extremist organisation’ is just a euphemism for forbidding a government-opposing group of people and harassing them individually with prosecution, while ‘opening a criminal case’ means than the gov found another company who's doing too much of the opposition thing. Both are nothing new here. (Of course, FB's specific action the FB-Kremlin exchange here are rather nonsensical and even comical, compared to the usual proceedings.)