It includes a bunch of new changes. The /proc/cpuinfo issue is also fixed.
With preferences open, the new “Tor” section doesn’t open in torbrowser-9.0 on qubes-whonix-15. Browser console shows “Command filtered” and other errors.
This issue appears to be whonix-specific – it doesn’t happen in an official torbrowser download in debian-10.
It is still possible to open the “Tor” section directly by opening a new tab and entering about:preferences#tor.
Does not look like it unfortunately. See this post for details: Restrict hardware information to root
I stand corrected.
(Restrict hardware information to root)