Managing personal Outlook.com account settings, security, and privacy
I am a Firefox user and I am having the same issue using this browser where I have a list of blocked senders and domains. When I log out and later log in, and go to junk...the save/discard pops up and the list is gone. If I click discard, the list shows up. I have clicked save once and the block list just stays empty. This did not start happening until the last update it seemed to have been made in Jan 25.