Comment 305 for bug 195698

Clearly this is a usability bug. It is a security risk in that if a person gets conditioned to entering his master password into a lot of dialog boxes a malicious app could throw up a similar dialog.

I agree with Mike that this is core functionality that cannot be trusted to a plugin.
I applaud Hubai for writing the plugin, but I don't know anything about him and am not about to risk my master password.