I used to have multiple chrome profiles I'd run at once, but this feature works so nicely & makes having work, banking, & other profiles nicely integrated but separate. It's made Firefox my primary browser!<p>The main pain is that I use github on multiple profiles, & cant make github.com/company/* go to a certain container. There's a ~5 year old issue for expanding matching support[1]. Some days I think about trying to hack on it.<p>[1] <a href="https://github.com/mozilla/multi-account-containers/issues/473" rel="nofollow">https://github.com/mozilla/multi-account-containers/issues/4...</a>