I use Edge as my secondary bowser and it's fast and has Smartscreen. Plus, I use it with uBlock Origin in Advanced User Medium Mode (I couldn't find my own link, duh!). It does take a little time investment to learn and use though. Medium Mode blocks all 3rd party frames & scripts and works on most sites. You tweak broken sites as needed for those you frequent. It's amazingly powerful! I never see ads anywhere unless I choose to. The key thing is to avoid flooding the rules list. I'm no geek and use it quite effectively. You could add McAfee SiteAdvisor as well but it limits the search engines you could use. And I prefer DuckDuckgo now regardless of browser so it doesn't work for me.
I rely primarily on Firefox Quantum. It's quite fast on my older laptop and it has the new Containers add-on with options to customize as you wish. I'm not sure if this add-on is more privacy- or security-oriented. Maybe someone else knows? I use it with Privacy Badger, uBlock Origin, HTTPS Everywhere & Decentraleyes. I fired up Google recently for some reason and it's slow and heavy in comparison (YMMV)!
Anyone of you has some idea to reduce exaggerated consumption of ram on Https Everywhere for chromium?, or has known some similar extension without that problem?. I need your help because that extension swallow 120mb to 180mb of ram on this PC. Instead of protecting I think that exist an dangerous memory leak bug accumulated in the background that could be exploitable by external code..