Those who know and love AI Roboform, which includes a password generator, and fills out website forms and logins and passwords, all encrypted, and accessed via a single master password will love the password manager built into Firefox. Firefox, however, does not contain a password generator, though there may be a plug-in or extension available.
To access the Password Manager, go to Tools>Options>Security tab>then click on “use a master password”, it will prompt you to enter a password (don’t forget it!), and from that point on will ask you if you want it to remember your login information for each site you visit.
As for encryption, Mozilla admits that it uses encryption, but if someone really wants access them, they will. True enough for just about any kind of security these days.
More information can be found on Mozilla’s own website.