I have only run into the following problem when using Microsoft Outlook 365 on Firefox on Windows 10. Here's the situation: For work, I am required to use Microsoft Outlook 365, and keeping my inbox organized is very important. I say this because I am moving emails to one of hundreds of folders all day, every day. When I try to move an email to a folder using the Move To search bar, it only lets me type one letter, and then the cursor goes away from that search box. It's as if the cursor has moved down to the first search result listed below the search bar once that first letter has been typed. The problem when this happens is that I can't type any additional letters without having to click back in the search bar to add the next letter. This does not happen in Google Chrome. Only in Firefox. Below is a screenshot of the issue.