I have been developing an Angular website that's served on port 4200 on localhost. Up until now it only accepted http connections, but I've now upgraded it to https. Firefox has about 50 credentials remembered for this site and it's always worked fine, but if I go to the https URL, it totally refuses either to show the existing password OR pop up the dialog box to add it for the new URL, so I have to type the password every time. I've disabled all extensions as suggested and it still doesn't work, although for the http URL it still does. I've not added any code on the site to discourage saving credentials. What do you suggest?