The only thing that will do this for you is a proxy or VPN service where all of your internet traffic is routed through it, otherwise you would need to install a content blocker for each browser but that won't block content or traffic that happens outside of it.
You can also use private browsing modes that are available in most browsers these days, but that doesn't generally block content so you would still need a content blocker to block ads and such.
I don't currently use a proxy or VPN service so I have no idea which to recommend.