Try signing in with saving the password. You could also change the home page to the default firefox page from Options >> Home >> New windows and tabs.

I have tried that but no help

Could you address your problem more clear and attach a photo if possible?

No photo, when I tap the Firefox tab and it opens Google is set as my home page, I have to sign in after closing the browser, Also in Gmail

It could be one of your add-ons causing that. If you don't have any add-ons installed, I'd suggest reinstalling Firefox.

Hi fordman337, If you store logins & passwords with a Master Password, you will have to enter your MP each time you begin a new session. Otherwise, check whether Delete Cookies & Site Data When Firefox Is Closed is selected on the Privacy & Security page in your Options.