Mozilla, as in the foundation, is broader than the browser and that blog has been running since 2007 with plenty of privacy focused content on it. The point of Mozilla has always been to advocate for an open internet rather than a corporate one, so I don't see the change in objective here. Firefox is one means to that end. Not sure why "marketing", "political" or "activist" are supposed to be negatives.
the part "Whether you want to follow in Neil Young’s footsteps or are already streaming music and podcasts through another service, deleting your stagnant Spotify account is a good idea." has nothing to do with privacy, but with an specific agenda.
I'm slightly out of the loop on the Neil Young stuff but I assume this is about Rogan spreading antivax content or something, which I don't think is very compatible with Mozilla pushing for an internet that is civil, free of misinformation and factual, so it seems to me they're sticking to their principles, which I think are very reasonable.