Most of my firewall knowledge is from decades ago when all a firewall ever did for me was slow things down and get in my way. Could have been for my own protection, but still was a pain. Even now I find that simple adblockers will get in the way and need to have lines added to a whitelist even when using regular websites and apps.
What does the firewall world look like right now? Will my family be asking why the internet isn't working properly if I decide to install a firewall?
+What simple adblockers do you use? I use the browser extensions Ublock Origin and/or Ghostery. No problem there. Easily configurable. If a website doesn't render right go to the upper right side of the browser, right click on the extension(s) and Trust Site/Allow/Power off
+You also might try using a HOSTS file on your local system to filter content. I use
https://winhelp2002.mvps.org/hosts.htm
+Also do you know about private/secure DNS? Try a search for "Quad9 9.9.9.9"
https://www.quad9.net/ or "Cloudflare for families"
https://cloudflare-dns.com/family/ ... i.e. let the DNS filter out malware, adult sites.
+ And of course diversion, skynet, pixelserv-tls, and a lot of the amazingly great scripts offered in these threads.
There is NO REASON at all why you would not want to layer your protections. SO it's not a matter of doing only one over another, do them all!!!
EDIT: One caveat--sometimes my wife yells at me when she (rarely) can't get her websites to work.


There might be some tweaking you must do, once in a great while, to get everything working on some (new) sites. A small price to pay for safe surfing, eh?