Beta Question

Hi, so i got my key today for the full version which is amazing, and i love the program although i have said all that before (go FF) Anyways on to my main question, i remember that it was said beta testers can keep on testing which is great but this got me wondering how does this work now i have the full version do the betas come in the form of an installer which will just update the files or is the beta and the full version going to be seperate? Also am i correct in thinking that im not going to have to keep entering beta keys which expire after a while like before the full version or will it keep running from now on without having to do all that if its not seperate and just installs over the old versions, sorry im thinking forwards into the future already hehe