Similar to https://support.mozilla.org/en-US/questions/1173871. I accidentally clicked on remove this from address bar (thinking that would remove the bookmark). I ran into https://support.mozilla.org/en-US/questions/1173871 with no solution but finally figured out how to add it back. But that thread was archived and closed. So I could not respond with a answer. Opening a new thread with to post the answer. Hoping that it will help others like myself who ran into this issue.