For example, my school laptop had Cisco Umbrella forcing DNS connections to itself, but half the time it never responded. Firefox DoH still worked because it di

For example, my school laptop had Cisco Umbrella forcing DNS connections to itself, but half the time it never responded. Firefox DoH still worked because it didn't rely on the system DNS setting, which needs admin perms to change. Eventually I fixed the problem entirely by escalating to admin with PrintNightmare and deleting Cisco Umbrella altogether.