Hello, you can see the error in the "image 060" screenshot. It's
"mount: mounting /dev/loop81 pm /tmp/tcloop/firefox failed: Invalid argument".
I should probably say I am running TC on VMWare Workstation Pro. 1GB HDD, 512MB RAM and 2vCPU.
Edit: ESR got installed without a hitch. I wish I thought about that before I spent hours troubleshooting it. Still not sure why the "normal" FF had an issue with the mount.