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Created attachment 1525148 [details]
Screenshot of remote-viewer window after lauching Remote Viewer from Firefox

Description of problem:
When accessing https://FQDN:9090/machines and clicking "Launch Remote Viewer" this fails to open a console. It seems to want a localhost connection to the server through a locally hosted browser, not a remote session from elsewhere on the network. 

Version-Release number of selected component (if applicable):
qemu-kvm-2.12.0-57.module+el8+2683+02b3b955.x86_64
cockpit-185-1.el8.x86_64

How reproducible:
100% thus far

Steps to Reproduce:
0. Disable firewalld to ensure open connectivity
1. Visit https://FQDN:9090/machines 
2. Choose a VM
3. Click "Launch Remote Viewer" 

Actual results:
Receive error "Unable to connect to the graphic server /tpm/mozilla_$USER0/[unique string] 
Could not connect to 127.0.0.1: Connection refused"
This does not occur when using `ssh -Y root@fqdn` and then launching firefox through with x-forwarding enabled. Console access is then available. Same is true with virt-manager through x-forwarding

Expected results:
VM console access available from any browser cockpit can be accessed by.

Additional info:

Cockpit team, can you take a look at this?

*** This bug has been marked as a duplicate of bug 1558219 ***