Staying bitter for two years is one thing, but it took me a few minutes to refresh actual details about what happened. The initial integration raised privacy concerns but mainly by being unclear. Since then things have steadily improved, like Pocket updating their privacy policy. https://venturebeat.com/2015/06/09/mozilla-responds-to-firef... There was a long discussion on the Mozilla Governance board that clarified a lot of things, including the legal department affirming that users were not automatically bound by Pocket's ToS. https://lwn.net/Articles/650869/ And eventually they bought Pocket. So while Mozilla isn't perfect, privacy is a real priority for them, and when they do mess up, they put a lot of time and effort into mitigation.
I don't think there is a basis for discussion here if you can't acknowledge that the mere installation of 3rd party addons & use of GA is a breach of trust.
