This is because users are being trained to use sites "with the yellow bar at the top" to do personal things (e.g logging in, credit card details, etc). Making u

This is because users are being trained to use sites "with the yellow bar at the top" to do personal things (e.g logging in, credit card details, etc). Making users have to jump through a couple hoops of hoops if the certificate is self-signed is a good way to protect users that don't understand the technology. While I understand you want to be very egalitarian about it most users would value their personal information's safety over the principle of a completely open web. In the spirit of the open web you are free to a) not use Firefox b) fork the Firefox project c) file a bug with Firefox d) contribute to Firefox and argue for this feature to be removed