Offer to save logins (default)
Supported on: Firefox 70 or later, Firefox 68.2 ESR or later
Registry
HKLM
Software\Policies\Mozilla\Firefox HKCU
Software\Policies\Mozilla\Firefox Value name: OfferToSaveLoginsDefault
Enabled: OfferToSaveLoginsDefault = 1
Disabled: OfferToSaveLoginsDefault = 0
Description
If this policy is enabled or not configured, Firefox will offer to save website logins and passwords. If this policy is disabled, Firefox will not offer to save website logins and passwords. In either case, the user will be able to change the value (it is not locked).