In Tor Browser prefs, "dom.network.enabled" should have been "dom.netinfo.enabled"
Seems to have been a typo from legacy/trac#5642 (closed). Lucky for us, this pref is disabled by default in Firefox desktop and also the API is disabled by privacy.resistFingerprinting thanks to https://bugzilla.mozilla.org/show_bug.cgi?id=1372072. We could set "dom.netinfo.enabled" to false just to be safe, or just remove the "dom.network.enabled" line altogether.
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information