> The only reason you have this problem is because the folks at Mozilla forgot to renew that intermediate certificate. While I agree that it should be possible for users to disable extension signing, as users should be able to do whatever they want on their own system, you shouldn't blame them for forgetting to renew a certificate associated with an additional security measure built to protect users from malware.

Well, we agree on everything, in that case. :) I have no problem with sensible defaults that can be adjusted, nor do I take great issue with Mozilla's specific mistake in letting the certs expire.

Edit: Also, just noting that I only lessen security measures when I have a reason, not because I'm rebelling against security practices or something. I use a Jailbroken iPhone because I run Jailbroken software, and I disable driver signing because I use unsigned drivers. It's not that I don't see the risks, so much as I'm very unconvinced the risks are worth the downsides, for me.