Using Fingerfox SE
Using the Fingerfox addon is pretty simple as well; it works just the same as it would on Internet Explorer. Go to a site that you want to save your password to and click the icon in the status bar or press Alt+X to open the Fingerfox window. Now, teach Digital Persona your information by pressing your finger to the fingerprint reader, and filling in the login information in Digital Persona. This should now be stored and remembered for future use.
To login using this information later, go back to the site and open Fingerfox by again clicking on the icon or pressing Alt+X, and then simply press your finger to the reader and your login information will be filled in. To eliminate the hassle of always having to manually open the reader first, it can be set to automatically open on that site using the automatic pop-up option once the icon is selected. There is also an Identify field in the options, where it can be set to identify either by host or by site. If set to host, the addon will pop up on all sub-sites of the current site (meaning if login is required in various areas of the site it will pop up for all of them). If set to site, it will pop up only on the current site.
Finally, because the reader was designed for IE, there are some sites that may not work automatically with the addon. It shouldn't come up often, and it shouldn't come up with bigger sites, but some poorly coded sites may cause issues. Those sites need to be manually added by the developer. There is a report site feature in the addon options that you can use to inform the developer, and then hopefully, it will be added soon.
Again, refer to the developer's site, which provides a guide to usage as well as a FAQ, if you have any further issues, but if you've got the proper software in place, you should have no trouble at all. Now you can just tap your finger to log in, instead of having to type out all those usernames and passwords with these easy tips on how to use the fingerprint addon for Firefox.
Screenshot FingerFox SE Login courtesy of Amews.