Error when making payment

Hello, When I submit a payment for my driver's license on my state's website site, it always tells me that an error has occurred and to try again. I have retried it for 6 times with the same result. The web site states that I should be using version 38 of Firefox or higher but I don't know how to check for this. When I go into about Firefox there is just a long string of numbers 144.0.1 that continues from here. Is this version 144.0.1 higher than ver 38? Thank you in advance for your reply.