This is a security feature. The passwords will only be saved for 30 days.

Is it just the master password or saved passwords as well? My saved passwords were visible. Is there any way to deactivate the feature or any other method to protect method to protect my saved passwords?

Thanks

That shouldn't be possible.

Did you reset Firefox or did Firefox otherwise create a new profile?

• http://kb.mozillazine.org/Profile_folder_-_Firefox

Do you have any extensions that might have cause this?

It is not recommended that you change this feature, but if you still want to your can try the following:

1. Go to about:config in Firefox
2. Find the string security.password_lifetime
3. Change this string's value to the amount of days that you wish to keep your master password valid

Please report back soon.

WARNING: Changing your password's lifetime can pose a serious security threat. This includes, but is not limited to identity theft and online account theft. Please do so at your own risk!

Great thank you very much

The security.password_lifetime pref doesn't have any effect in Firefox, so there is no need to change this pref.
A search only comes up with the line in the related pref file.

• http://mxr.mozilla.org/mozilla-release/search?string=password_lifetime&find=&findi=&filter=^[^\0]*%24&hitlimit=&tree=mozilla-release

(the tree for Thunderbird and SeaMonkey give results)