Any website that has any sort of third party analytics or advertising invades privacy. All three of the major browsers invade privacy (or allow it to leak out).

Any website that has any sort of third party analytics or advertising invades privacy. All three of the major browsers invade privacy (or allow it to leak out). Governments monitor and store data directly from ISPs. Windows 10, which isn't free, has tons of privacy issues. The issue is not in any sense limited to "free" things.