diff --git a/netwerk/dns/TRR.cpp b/netwerk/dns/TRR.cpp
index 62211b0e9a38..d3d9364a0cd5 100644
--- a/netwerk/dns/TRR.cpp
+++ b/netwerk/dns/TRR.cpp
@@ -150,6 +150,7 @@ nsresult TRR::CreateQueryURI(nsIURI** aOutURI) {
 
   nsresult rv = NS_NewURI(getter_AddRefs(dnsURI), uri);
   if (NS_FAILED(rv)) {
+    RecordReason(TRRSkippedReason::TRR_BAD_URL);
     return rv;
   }
 
diff --git a/netwerk/dns/nsDNSService2.cpp b/netwerk/dns/nsDNSService2.cpp
index 632e02a6e237..7ff03ba7f7cb 100644
--- a/netwerk/dns/nsDNSService2.cpp
+++ b/netwerk/dns/nsDNSService2.cpp
@@ -1632,6 +1632,7 @@ nsresult GetTRRSkipReasonName(TRRSkippedReason aReason, nsACString& aName) {
   static_assert(TRRSkippedReason::TRR_HEURISTIC_TRIPPED_VPN == 45);
   static_assert(TRRSkippedReason::TRR_HEURISTIC_TRIPPED_PROXY == 46);
   static_assert(TRRSkippedReason::TRR_HEURISTIC_TRIPPED_NRPT == 47);
+  static_assert(TRRSkippedReason::TRR_BAD_URL == 48);
 
   switch (aReason) {
     case TRRSkippedReason::TRR_UNSET:
@@ -1778,6 +1779,9 @@ nsresult GetTRRSkipReasonName(TRRSkippedReason aReason, nsACString& aName) {
     case TRRSkippedReason::TRR_HEURISTIC_TRIPPED_NRPT:
       aName = "TRR_HEURISTIC_TRIPPED_NRPT"_ns;
       break;
+    case TRRSkippedReason::TRR_BAD_URL:
+      aName = "TRR_BAD_URL"_ns;
+      break;
     default:
       MOZ_ASSERT(false, "Unknown value");
   }
diff --git a/netwerk/dns/nsITRRSkipReason.idl b/netwerk/dns/nsITRRSkipReason.idl
index dedca0231606..096f0151bbeb 100644
--- a/netwerk/dns/nsITRRSkipReason.idl
+++ b/netwerk/dns/nsITRRSkipReason.idl
@@ -60,6 +60,7 @@ interface nsITRRSkipReason: nsISupports
     TRR_HEURISTIC_TRIPPED_VPN = 45,                // The heuristic was tripped due to a vpn being detected
     TRR_HEURISTIC_TRIPPED_PROXY = 46,              // The heuristic was tripped due to a proxy being detected
     TRR_HEURISTIC_TRIPPED_NRPT = 47,               // The heuristic was tripped due to a NRPT being detected
+    TRR_BAD_URL = 48, // We attempted to use a bad URL (doesn't parse or is not https).
   };
 };
 
diff --git a/toolkit/content/aboutNetError.mjs b/toolkit/content/aboutNetError.mjs
index 2ac54d7aa5c6..1c92a2927409 100644
--- a/toolkit/content/aboutNetError.mjs
+++ b/toolkit/content/aboutNetError.mjs
@@ -544,6 +544,8 @@ function initPage() {
         skipReason == "TRR_SERVER_RESPONSE_ERR"
       ) {
         descriptionTag = "neterror-dns-not-found-trr-server-problem";
+      } else if (skipReason == "TRR_BAD_URL") {
+        descriptionTag = "neterror-dns-not-found-bad-trr-url";
       }
 
       let trrMode = RPMGetIntPref("network.trr.mode").toString();
diff --git a/toolkit/locales/en-US/toolkit/neterror/netError.ftl b/toolkit/locales/en-US/toolkit/neterror/netError.ftl
index de3fa65b88b7..6ecfa143e463 100644
--- a/toolkit/locales/en-US/toolkit/neterror/netError.ftl
+++ b/toolkit/locales/en-US/toolkit/neterror/netError.ftl
@@ -65,6 +65,7 @@ neterror-dns-not-found-trr-only-timeout = The connection to { $trrDomain } took
 neterror-dns-not-found-trr-offline = You are not connected to the internet.
 neterror-dns-not-found-trr-unknown-host2 = This website wasn’t found by { $trrDomain }.
 neterror-dns-not-found-trr-server-problem = There was a problem with { $trrDomain }.
+neterror-dns-not-found-bad-trr-url = Invalid URL.
 neterror-dns-not-found-trr-unknown-problem = Unexpected problem.
 
 ## Native fallback specific messages