[{'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: We may need to change this policy and our notices. The updates will be posted online. If the changes are substantive, we will announce the update through Mozilla's usual channels for such announcements such as blog posts and forums. Your continued use of the product or service after the effective date of such changes constitutes your acceptance of such changes. To make your review more convenient, we will post an effective date at the top of the page."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]