i have an android tablet and can't download anything from google play. is there an alternate site to download firefox from?

Supposedly my tablet cannot download from the google play market due to the fact that it looks for cell numbers first to download to and I have an android phone and it wants to download to that and not my tablet. Therefore, I need an alternate site in which to download FFox to my tablet. I hope there is one and fast! Thanks in advance, Gigi