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.
Jeli maće <a href="https://support.mozilla.org/kb/organize-your-messages-using-filters">e-mejlowe filtry</a>, kotrež, na přikład, mejlki do lokalnych rjadowakow přesuwaja, dyrbiće rozsudźić, hdźež so maja filtry wuwjesć – w swojim betaprofilu abo w swojim druhim profilu.