Re: Browser Profiles vs Containers
I think you can only use one profile at a time, but Firefox has a new feature (via a plugin from Mozilla) called Containers. These are brilliant! Colour coded tabs so you can see which is which, with own cookie store, history etc. I can log into different MS email accounts at once. If you launch Teams from one of these it still gets a little confused sometimes, but luckily I mainly use Zoom.
And yes, that's Teams in Firefox in Linux.
The only thing I dislike about containers is that so far you can't associate a container with a url in the bookmark system. Containers can be set for urls, but with MS or gmail its often the same url for multiple accounts.