Auto Log in extension for FF?

Is there an extension that would automatically log me into certain websites in Firefox?
The reason I am asking is because in private mode I have to repeatedly log myself into this and other forums.

 

Password managers like keepass + keyfox (add-on) and lastpass would be a good place to start if you don't trust firefox's password management (which I don't). I'm not sure I'd been entirely safe though relying on an automated add-on to sign me into websites.

 

Will they automatically log me in when my browser is inprivate mode?

 

I like Secure Login.

 

I'm currently signed in under Private Browsing mode. So yes it will auto-fill my account details into the websites that I visit. I'm not a big fan of auto-fill and auto-sign-in because it poses a security risk, but if this is what you truly want then I've posted a screen shot of add-on settings and I'll list what you should change them too.

When I choose a matched password, KeeFox should:
Fill in and submit the form

When KeeFox chooses a matching login for: A standard form
Fill in and submit the form

When KeeFox chooses a matching login for: An HTTPAuth, NTLM or proxy prompt
Fill in and submit the form the login prompt

 

Lastpass has auto login as an ability.