sudden, strange refusal by Firefox to log in to the public on-line access (of a certain university hospital) which on-line service I have regularly used -- its certificates are up to date; no one else around me has had any problem logging in. NB I can access by using the Fiirefox 'Private Browsing' option, but it so happens that using the 'Private Browsing' is very inconvenient here for other reasons. Please advise.