There are two things buying roboform has going for it. Multiply identities and multiply logins.
To use it, without purchasing it, you will have to have the same username and password to fill it in automatically. On your personal info, under authentication, put your favorite user name and password.
When you click on the button that has a picture of a person and your name on it, the form will fill out with your address, etc. or it will fill in your login name and password.
For pass logins, you will have to copy and paste it if you don't remember what it is.
Shouldn't write when I'm tired. Hope I made sense. Granddaughter is staying with us and husband is working nights this week.