[{'role': 'user', 'content': "Analyze the following clause from a privacy policy and determine if it's fair or unfair. Also identify any privacy practices mentioned: Note there are various levels of cookie enablement and disablement in Firefox. For more information, refer to the following page from Mozilla: https://support.mozilla.org/en-US/kb/enable-and-disable-cookies-website-preferences"}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]