I don't think the things you cite necessarily mean "Mozilla doesn't care about the privacy of it's users". There's always room for improvement, but "they're not perfect" != "they don't care".
Tangentially related: ungoogled Chromium has some impact on Google's monetisation, but zero impact on their browser monopoly, because in the end you're still using their browser engine. So if you're talking about counteracting browser monopoly, ungoogled Chromium is not a good choice.
