Is this just placing them vertically, nothing else?
I currently use the Tree Style Tab extension and really like how it handles sub-tabs and allows collapsing the tree nodes. If I can’t have that this is probably not directly useful to me unless extensions can add that functionality.
I guess I’ll be watching how this evolves though.
For TLS-based protocols like HTTPS you can run a reverse proxy on the VPS that only looks at the SNI (server name indication) which does not require the private key to be present on the VPS. That way you can run all your HTTPS endpoints on the same port without issue even if the backend server depends on the host name.
This StackOverflow thread shows how to set that up for a few different reverse proxies.