Watch out what you're agreeing to. Sites can share your email and telephone number with data brokers, if you've provided this info and clicked "agree".

You're agreeing to all — otherwise illegal — tracking they can manage to do, not just some cookies.

Unlike Safari, Firefox doesn’t block all third party cookies by default (because that breaks some websites’ legitimate use cases). Firefox does block known tracking cookies (with its “Enhanced Tracking Protection” Block list) and the remaining cookies are sandboxed to each website (“Total Cookie Protection”), so the Google tracking cookies on foo.com don’t know about the Google tracking cookies on bar.com.