Firefox (Aurora) and I get this: Your browser's cookies seem to be disabled. Ads Preferences will not work until you enable cookies in your browser. How do I

Firefox (Aurora) and I get this: Your browser's cookies seem to be disabled. Ads Preferences will not work until you enable cookies in your browser. How do I enable cookies? No, cookies are not disabled. I am even logged in on the Google website. Maybe because I don't live in the US?