I also do not have a stay in option.
In the preferences in google and I on the right site I have an option furthe google services.
There I disabled Allow iron sign-in and I am always signed in into ll google services.
I hope I can help. Because I have Iron in German and I tried to translate my German options into English.
How to force Iron to stay sign in
Re: How to force Iron to stay sign in
Direct in Iron go to Settings -> You and Google -> Sync and Google Services
Now you see the topic Other Google services on the right
There you have to switch off the option:
Allow Iron sign-in
Then restart your browwer. When I now got to gmail and sign in I am always stay logged in even when I restart my system or Iron.
Now you see the topic Other Google services on the right
There you have to switch off the option:
Allow Iron sign-in
Then restart your browwer. When I now got to gmail and sign in I am always stay logged in even when I restart my system or Iron.