For those of you who have the TorButton extension installed and are running into this problem, disable TorButton entirely (through Tools -> Add-Ons), restart Firefox, install the certificate, and then re-enable TorButton. This worked for me.
For other cases, http://groups.google.com/group/mozilla.dev.tech.crypto/browse_thread/thread/f83eff33951b80bf has some insights about PSM, the Firefox code that provides the GUI for the crypto stuff.
For those of you who have the TorButton extension installed and are running into this problem, disable TorButton entirely (through Tools -> Add-Ons), restart Firefox, install the certificate, and then re-enable TorButton. This worked for me.
For other cases, http:// groups. google. com/group/ mozilla. dev.tech. crypto/ browse_ thread/ thread/ f83eff33951b80b f has some insights about PSM, the Firefox code that provides the GUI for the crypto stuff.