Thanks, Mangy Dog. The guide "Tweak your browser to enhance security and
privacy" is pretty good.
https://trisquel.info/en/wiki/tweak-your-browser-enhance-security-and-privacy
The Useful Addons are really useful. I already use HTTPS Everywhere,
NoScript, Privacy Badge both on Abrowser and IceCat. I used Disconnect, but
I stopped using it- I think I remember that it was because there was webpages
content missing. I might give it another try. On top of that, I use:
-On IceCat: GNU LibreJS, Request Policy, SpyBlock. It goes slow.
-On Abrowser: Stop Fingerprinting and uBlock Origin. It goes right.
The about:config Tweaks are useful too. Even having the mentioned add-ons,
still seven from the fourteen tips weren't applied to my Abrowser
configuration - so I tried them. So far I only had to go back on point 8 -
changing the value from network.cookie.lifetimePolicy to 2 meant that I could
no longer log in to Facebook.