Definitely this. I don't have issues with Firefox integrating useful functionality into the browser, but what they did with the pocket integration was delegate

Definitely this. I don't have issues with Firefox integrating useful functionality into the browser, but what they did with the pocket integration was delegate their duty of protecting users' privacy to a third-party, profit-driven company that does not have users' best interests at heart. This is an act that betrays the trust that users have placed in Mozilla.