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Not sure if this is possible -- I have a username and password combo which is valid for all sub-domains of a given domain, that is:,,, etc. Is there any way I can tell Firefox that the saved password for one of these subdomains is valid for all of them? RIght now I have been retyping it for each one, and saving them individually. But the list of these subdomains will be constantly growing...

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See "Default username and password for *" at… – Arjan Nov 12 '09 at 19:41
up vote 2 down vote accepted

You can do this using firefox addon called LastPass. This addon recognizes that subdomains and prompts you to use previously saved password.

LastPass is also a third party service which stores your password in 128bit encrypted cloud server. Your passwords never leave your system. Passwords are encrypted on system and then sent server.

hope this helps.

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Good suggestion. I was hoping for a built in way but it looks like there's not. I suppose this would eliminate Firefox's annoying habit of asking me for my master password 10,000 times. Thanks! – Josh Nov 13 '09 at 13:10

I filed a bug for this on Firefox. Surprised it wasn't filed already:

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Incredible, I still cannot use it nearly five years later. Due to Opera (which has a decent password manager) giving up on Presto, I decided finally to switch to Firefox and get to see plenty of shortcomings already in the first few hours. The new Opera versions would be even worse, though. – 0xC0000022L Apr 15 '15 at 11:37

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