Domain Password Hasher от Nick Vodyakho

If you have to visit different websites with authorization from multiple devices, and there's no option to sync passwords between devices (for various reasons), you'll either need to use the same passwords on multiple websites or have a perfect memory to remember them all.
This extension allows you to locally generate complex and unique passwords based on just one (or multiple) user passwords and the website's domain string.
The password generation function is simple:
site_password = Base64(SHA-256("user_password"_"domain"))