--- a/mail/components/preferences/connection.js
+++ b/mail/components/preferences/connection.js
@@ -63,29 +63,29 @@ window.addEventListener("DOMContentLoade
     () => gConnectionsDialog.readProxyProtocolPref("ssl", true));
   Preferences.addSyncFromPrefListener(document.getElementById("networkProxySOCKS"),
     () => gConnectionsDialog.readProxyProtocolPref("socks", false));
   Preferences.addSyncFromPrefListener(document.getElementById("networkProxySOCKS_Port"),
     () => gConnectionsDialog.readProxyProtocolPref("socks", true));
   Preferences.addSyncFromPrefListener(document.getElementById("networkProxySOCKSVersion"),
     () => gConnectionsDialog.updateDNSPref());
 
-  let element = document.getElementById("networkDnsOverHttps");
-  Preferences.addSyncFromPrefListener(element, () => gConnectionsDialog.readDnsOverHttpsMode());
-  Preferences.addSyncToPrefListener(element, () => gConnectionsDialog.writeDnsOverHttpsMode());
-
   // XXX: We can't init the DNS-over-HTTPs UI until the syncfrompref for network.trr.mode
   //      has been called. The uiReady promise will be resolved after the first call to
   //      readDnsOverHttpsMode and the subsequent call to initDnsOverHttpsUI has happened.
   gConnectionsDialog.uiReady = new Promise(resolve => {
     gConnectionsDialog._areTrrPrefsReady = false;
     gConnectionsDialog._handleTrrPrefsReady = resolve;
   }).then(() => {
     gConnectionsDialog.initDnsOverHttpsUI();
   });
+
+  let element = document.getElementById("networkDnsOverHttps");
+  Preferences.addSyncFromPrefListener(element, () => gConnectionsDialog.readDnsOverHttpsMode());
+  Preferences.addSyncToPrefListener(element, () => gConnectionsDialog.writeDnsOverHttpsMode());
 }, { once: true, capture: true });
 
 var gConnectionsDialog = {
   beforeAccept() {
     let dnsOverHttpsResolverChoice = document.getElementById("networkDnsOverHttpsResolverChoices").value;
     if (dnsOverHttpsResolverChoice == "custom") {
       let customValue = document.getElementById("networkCustomDnsOverHttpsInput").value.trim();
       if (customValue) {