It is pretty unique browser because of its possibility to have synced all of workspaces and sessions and being logged in on different computers with the same tabs collection, the uniqueness among other browsers is because for sync might be used any cloud storage you use, because it does not use creators servers. Sync can be done even in a local network, the only need to have - a shared directory (I, personally, use it that way to share tabs within my family in a separate browser's profile).
I saw several comments here that this browser is commercial only, but that is not true. How then I use it? It the has a free version but with limitation to the workspaces and sessions maximum number.