Mullvad Browser (Firefox Derivate) not supported by Cockpit?

Hi

I am running Cockpit on Debian (Raspberry PI) and old version:

$ cat /etc/debian_version
12.12

$ dpkg -l | grep cockpit
ii  cockpit                              287.1-0+deb12u3                          all          Web Console for Linux servers
ii  cockpit-bridge                       287.1-0+deb12u3                          arm64        Cockpit bridge server-side component
ii  cockpit-networkmanager               287.1-0+deb12u3                          all          Cockpit user interface for networking
ii  cockpit-packagekit                   287.1-0+deb12u3                          all          Cockpit user interface for packages
ii  cockpit-podman                       67-1                                     all          Cockpit component for Podman containers
ii  cockpit-storaged                     287.1-0+deb12u3                          all          Cockpit user interface for storage
ii  cockpit-system                       287.1-0+deb12u3                          all          Cockpit admin interface for a system
ii  cockpit-ws                           287.1-0+deb12u3                          arm64        Cockpit Web Service

I can’t see the container logs and container console with Mullvad Browser:

On latest Safari (macOS 26) it works:

Do others have the same problem with Mullvad Browser?

Privacy-focused browser for Linux, macOS and Windows. Made in collaboration between @torproject and @mullvad