You don't say what "accounts and settings is. It
looks like settings for a cellphone. given what you
said about AV I'd assumed you were talking about
Windows.

A couple of thoughts:

* I'd agree about avoiding anything from Symantec.
It's all bloated junk. Avira causes too many false
positives. I've installed Avast for friends, as the lesser
of the evils. Personally I don't use AV and would never
use Malwarebytes. It's not that I don't think people
should use them. It's just that they take a lot of
resources and don't work very well. The whole idea is
outdated. But for people who don't know how to protect
from malware, AV is better than nothing.

* Cookies: A lot of sites won't work without cookies,
but they don't have to be a privacy problem. In Firefox
one can block 3rd-party cookies and set it to delete
all cookies when FF is closed.

* LinkedIn, Facebook: No one who cares about privacy
at all could possibly use LinkedIn or Facebook or GMail
or Chrome or anything else from Google. That's the simple
fact of the matter. You can't live your life online, hosted
by sleazy advertising companies, and then expect to protect
your privacy.
Also, LinkedIn is especially sleazy with spam. They trick
members into sharing their address books. A number of times
I've got spam from them sayying that someone wants me to
join LinkedIn, yet that someone knew nothing about it.