I've been using this since it was new. I'm very frustrated to say the UI/UX hasn't seen any significant update. Containers are still synced separately, so any fresh install of Firefox will have the tutorial UX and the default 4 containers, even after syncing. Also, address bar completion is still monolithic, making it very easy to accidentally open a site in an undesired container. That can be worked around by adding…
container sync has been a thing for a while, but you have to enable it: https://i.imgur.com/UBj3TjW.png
1. Install Firefox.
2. Log in to fresh Firefox instance.
3. Let browser-wide sync happen.
4. Sync installs multi-account containers addon.
5. Four empty default containers are created. New user welcome flow is active.
6. Sign in to multi-account containers addon. Wait for container sync to do its thing.
7. Containers sync invisibly in the background.
- Default containers that you deleted before (in the instance you are syncing from) still exist in this fresh instance.
- New user welcome UX is still active.