You can also try this user script which I am using in Firefox https://greasyfork.org/en/scripts/552472-allow-pip-in-teams-meetings https://greasyfork.org/en/scr

You can also try this user script which I am using in Firefox https://greasyfork.org/en/scripts/552472-allow-pip-in-teams-meetings https://greasyfork.org/en/scripts/552472-allow-pip-in-teams-... It works great