It should be difficult to lose all our registered information. Especially when we frequently travel back and forth to play. On the other hand, our phones or other devices usually store login information for casinos, and I personally use them to make logging in easier.
I don't use password save feature on any web browser, it is dangerous practice that should be avoided.
If you want to store your account information: email password, email 2FA, phone number for registration and similar ones for your accounts, use password manager softwares for this task.
Don't be unknowledgeable and lazy and rely on such features on browsers, you will be in danger.
Password managers list with softwares are open source, avaialble for computers and mobile devices.