[{'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: How you can control tracking technologies You may be able to block or manage certain types of tracking technologies via your browser settings (such as cookies or web beacons) or your mobile device. However, please remember that if you block tracking technologies, we may not be able to provide you with the optimal WeChat experience and some or all of WeChat's features may not function properly."}, {'role': 'assistant', 'content': 'This clause is unfair. The privacy practices mentioned are: Identifier_Cookie_or_similar_Tech_1stParty.'}]