How do I stay signed in at ALL websites?

All websites will eventually sign you out on their own, as a practical matter and a security measure.

Bank accounts are not a google account, and we are talking about google, yahoo etc. And you said "All websites".

It also isn't the password that gets stored there, but a session token that is valid until you "log out" (obviously websites can put policies in place to invalidate it after not using it for a month or so, but this is not often used.).

Also, cookies get stored in "%userprofile%\AppData\Local\Google\Chrome\User Data\Default\Network\Cookies" (Location may differ with browser) in an SQLite Database with encrypted binary values, not plain text. (I don't know what browser you are using that is still storing cookies as plain text but remind me to never use it.)

But we're getting off topic...

Two Factor Authentication is a good idea. Especially when the account is more critical (maybe your PayPal, or your Email account which can probably be used to reset any other account.)

In addition to that, it is actually not much better to log in to an account every time.

Since malware is getting better and better, and also it gets easier to get infected day by day, logging in is something that should be done as rarely as possible.

Malware like keyloggers can snatch away your password without you even noticing if you log in over and over again. (Therefore 2FA is a good idea.)

While it is still possible to get the session key from your browser if you are logged in, it is way harder and less likely.

Staying logged in also reduces phishing, since you will probably double-check why you need to authenticate when you are logged in already.

Also, if you lock your device when you leave it, and have some sort of encryption (session keys are by default encrypted with your user account key, same as saved passwords in the browser) it is not possible to extract the keys easily, and no-one is able to access the logged in account. If you want to make sure no-one logs in, you can also encrypt your entire disk using BitLocker or some other solution.

I never had that happen, neither with my google, nor with anything else...

Usually only happens when you delete cookies and/or log out.

I always have that happen. If your bank's website doesn't automatically log you out after x minutes of inactivity, remind me not to open an account there. 😉

No website should store a password in a cookie - cookies are text files!

I never had that happen, neither with my google, nor with anything else...

Usually only happens when you delete cookies and/or log out.