This is a great tool. I especially like it because if my laptop gets stolen (and it is in hibernation or sleep mode, which it often is, with firefox open) it makes it more likely that my passwords are safe. I know that there are ways to extract them anyway, but 95% of people arent going to know that and this makes me feel much more secure.
I tried to contact the creator, who hasnt updated this in some time, but his website is dead.
If he reads this i do have a question and a possible recommendation based on that question.
does this rely on its own timer, or does it go by system time? If would like to see it go by the system time so that way if i put my laptop to sleep and 30 minutes go by, it would 'realize' this and lock (if its over the set timeout), rather than its own timer 'pausing' count when in sleep mode.