FF 87.0, Ubuntu 20.04 Can't share screen
I'm having trouble sharing my screen with Firefox 87 on Ubuntu 20.04.2.
What happens when I go to share, the "Will you allow <site> to share your screen" window pops up. "Select a Window or Screen" is autofilled, but I cannot hit 'allow' (it is greyed out). When I click the dropdown, the "Select a Window or Screen" option is greyed out, and my only other option is "Use Operating System Settings". When I select this I can hit "allow", but no other options pop up and my screen is not shared, although firefox seems to think so (shows the orange symbol at top, site privacy settings show sharing allowed).