I love how easy FireFox makes it to enter passwords and forget them. But sometimes it turns out to be a problem when I need to remember them. Like when I'm using a different computer or want to change my password.
Today, I found Unhide Passwords, a FF extension that will show you your password when you roll the mouse pointer over the password field. It's easy to disable when you don't want passwords revealed but it's already proven useful twice today.
It doesn't replace keeping your passwords accessible somehow, someway. However, it seems well written and I highly recommend it.