Unless 95% of people can't use google, I would assume everyone would be able to find that. I just googled "Firefox forgot master password", it was one of the top results, IIRC. IE Passview does the same for Internet Explorer, which I found again after a few seconds of googling. If someone gets physical access to your computer, it is more or less game over if they really wanted to do something. If you feel protected by this, by all means use it, I really don't see how it makes your passwords any more secured though.Really ?
You can't understand the idea that 95% of people won't ever find that ?
Also note that both these tools are commonly used to restore forgotten passwords, so it is actually highly likely that people know of them if they ever had the need for them.