[ypeter]

Have you tried Multi-Account Containers? It’s not the same but for me it works (I want to be logged in with various accounts on the same website)

[jpalomaki]

Multi-account containers is the reason why I'm using Firefox.

Too bad it is just an extension and not a first-class feature. The settings are not synced with other Firefox settings. Somewhat annoying as there is lot of work to setup the container settings if you happen loose then.

[bennyz]

Containers are nice and I use them, but unfortunately they are not enough since they are not synced and don't solve the bookmarks issue

[philshem]

Link: https://addons.mozilla.org/en-US/firefox/addon/multi-account...

[ailideex]

I actually prefer the multi-account containers to chrome's profile approach.