You'd have to block requests to third parties. This is hard because it breaks most websites - all those that rely on cdns. You can wade through this with a script blocker like ublock origin and a whitelist but you don't really know what's happening unless you investigate each domain and script.

Even then you'd still be exposed to fingerprint tracking served through the original domain passing on to a third party at the back end.

Tracking isn't fixable with technological solutions alone.