Greasy Fork is available in English.
Disable google's automatic sign-in, yes, as simple as that
A really simple GreaseMonkey script, it disable the "Sign me in automatically" checkbox on google login page.
Since I use KeePass and I integrated it with Firefox and chrome being automatically logged in seemed stupid to me and disabling every time the checkbox was time consuming.
I hope someone else will find this useful :)
PS Bear with me, it's my first try