Will the 2nd Profile version be updated to 57?

Hello. I don't want to update my main Firefox installation yet because several add-ons I use are legacy without replacements. But I'd like to segue to FF 57 and instead of creating a new Portable Apps directory it would be nice to use a 2nd profile installation in my regular PA directory for the transition. I know I can use the beta but betas are betas.

Have a nice day!