Browser tracking data has already been obtained by the government for years, without your consent and without a warrent. If you have been thinking you had privacy before, think again. If you truly want privacy there are tools available -like using open source, privacy aware browsers; Tor; and add-ons like HTTPS Everywhere, Self-destructing Cookies, and Ublock. People might call you paranoid, but in the end YOU are responsible for your privacy, nobody else.