Consider disabling network.connectivity-service.enabled

NetworkConnectivityService probes http://detectportal.firefox.com/success.txt?ipv4 and http://detectportal.firefox.com/success.txt?ipv6 whenever network state changes (event network:link-status-changed). We should probably disable this unless it's needed for browser functionality.

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information