If you have <a href="https://support.mozilla.org/kb/organize-your-messages-using-filters">mail filters</a> that, for example, move mail to local folders, then you must decide where to run filters - in your beta profile or your other profile.
如果您设置了<a href="https://support.mozilla.org/kb/organize-your-messages-using-filters">邮件过滤器</a>（例如其将邮件移动到本地文件夹），您就需要指定过滤器的执行位置（在测试版配置文件还是在其他配置文件中）。