Very nice extension. I added 'Multi Account Container' and Pinned it there so it always opens up, runs in the background and is out of my way as a tiny tab in the corner.

Great, simple add-on.

Just wondering: are there any downsides to polling for email every minute? Is it possible to reduce the frequency to every 5 or 10 minutes?

Exactly what I needed

Its surprisingly ingenious.

The addon functions perfectly and does its job without any hassle! I like to open the account page in one window, then just minimize it and open a new window to continue using Firefox