Drag and drop for email recipients not working on Outlook web, only Firefox

[kanonkosmos]

Recently, when I'm writing or replying to an email in Outlook Web and I'm trying to drag and drop a contact name (lets say from the "To" field to "Cc" field) it's no longer working. It is frustrating and annoying since I have to manually type the contact name or email in the field I need and delete it from the other one.

This happens only on Firefox. I replicated on Chrome and there's no issue there.

This didn't happen before. It started a couple weeks ago.

[#2]

@kanonkosmos 

Same issue.

Tried clearing cookies, restarting all the normal stuff - no improvement.

I use other email systems and they do not exhibit this behavior in Firefox so I'm pretty sure its just normal MS nonsense again.

[#3]

I'm also experiencing this issue in Firefox on a Mac.

[#4]

@Michael_von_Pohle 

Same issue