bought this new tablet and it won't allow me to open Firefox. why? I can still open on my cell.

Just purchase this new tablet but Firefox won't allow me to open it on this new device. I'm still allowed on my cell phone what is the problem.? This is way more complicated than it should be. Please help.. I am available to be emailed on my Google account, [edited email] or call or text [edited phone# from public community support forum] Or my orphanage originally aol email: [edited email]