Consider protecting against webextensions with "proxy" permissions
AFAIK, if a user installs a webextension with "proxy" permissions it may result in proxy bypass. We don't support nor encourage users installing extensions, but given how critical are proxy bypasses it might be a good idea to try to make sure that no webextension can cause one.
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information