Note that most of the signers are from companies which collect substantial consumer information for revenue purposes. Hence the emphasis on "updating". And the absence of "turn up browser security levels to max" or "get a good ad blocker". Also, any password manager that's "cloud based" is potentially a security hole. Yeah, they say the server is secure. Right.
Maximizing privacy is a somewhat different goal, and recommendations for how to do so would differ from person to person. Some people really don't care about privacy. And for some other people, adblocker and tracking-blocker software is sufficient for their privacy needs. Whereas for certain people in certain parts of the world, literally the only way they can browse the Web safely is with Tor running on a temporary TailsOS drive.