The master password (MP) is used to encrypt usernames and passwords that are stored in the Password Manager. That is all it does, it doesn't prevent Firefox from starting. Firefox prompts for the MP when it is necessary to access the stored passwords like when you have saved a password for the website in the current tab. Sync also uses the Password Manager, so if you use Sync then you will be prompted for the MP every time you start Firefox.

• https://support.mozilla.org/en-US/kb/use-master-password-protect-stored-logins

cor-el said

The master password (MP) is used to encrypt usernames and passwords that are stored in the Password Manager. That is all it does, it doesn't prevent Firefox from starting. Firefox prompts for the MP when it is necessary to access the stored passwords like when you have saved a password for the website in the current tab. Sync also uses the Password Manager, so if you use Sync then you will be prompted for the MP every time you start Firefox.

• https://support.mozilla.org/en-US/kb/use-master-password-protect-stored-logins

Thanks fror your help.

Does this answer your question or do you need more information?

cor-el said

Does this answer your question or do you need more information?

so does the mp work on my phone as well since i have firefox on there to?

The master password isn't synced, so you need to setup Firefox on each connected device to use a MP (this can be a different MP as far as I know). I don't know if still the restriction that passwords are only synced when a device is using the MP, so the passwords are secure.

cor-el said

The master password isn't synced, so you need to setup Firefox on each connected device to use a MP (this can be a different MP as far as I know). I don't know if still the restriction that passwords are only synced when a device is using the MP, so the passwords are secure.

Thanks for your help, This solves my question.