diff --git a/security/manager/ssl/public/nsICertOverrideService.idl b/security/manager/ssl/public/nsICertOverrideService.idl
index bfd96233c401..14b5c5733fff 100644
--- a/security/manager/ssl/public/nsICertOverrideService.idl
+++ b/security/manager/ssl/public/nsICertOverrideService.idl
@@ -18,7 +18,7 @@ interface nsIX509Cert;
  *   {host:port, cert-fingerprint, allowed-overrides} 
  * that the user wants to accept without further warnings. 
  */
-[scriptable, uuid(be019e47-22fc-4355-9f16-9ab047d6742d)]
+[scriptable, uuid(31738d2a-77d3-4359-84c9-4be2f38fb8c5)]
 interface nsICertOverrideService : nsISupports {
 
   /**
@@ -109,11 +109,13 @@ interface nsICertOverrideService : nsISupports {
                              in int32_t aPort);
 
   /**
-   *  Count and return the number of permanent overrides.
+   *  Obtain the full list of hostname:port for which overrides are known.
    *
-   *  @param aCount The number of permanent overrides
+   *  @param aCount The number of host:port entries returned
+   *  @param aHostsWithPortsArray The array of host:port entries returned
    */
-  void getPermanentOverrideCount(out uint32_t aCount);
+  void getAllOverrideHostsWithPorts(out uint32_t aCount, 
+                                    [array, size_is(aCount)] out wstring aHostsWithPortsArray);
 
   /**
    *  Is the given cert used in rules?
diff --git a/security/manager/ssl/src/nsCertOverrideService.cpp b/security/manager/ssl/src/nsCertOverrideService.cpp
index 66deb99f7930..bd89dfb3ea24 100644
--- a/security/manager/ssl/src/nsCertOverrideService.cpp
+++ b/security/manager/ssl/src/nsCertOverrideService.cpp
@@ -653,28 +653,11 @@ nsCertOverrideService::ClearValidityOverride(const nsACString & aHostName, int32
   return NS_OK;
 }
 
-static PLDHashOperator
-CountPermanentEntriesCallback(nsCertOverrideEntry* aEntry, void* aArg)
-{
-  uint32_t* overrideCount = reinterpret_cast<uint32_t*>(aArg);
-  if (aEntry && !aEntry->mSettings.mIsTemporary) {
-    *overrideCount = *overrideCount + 1;
-    return PL_DHASH_NEXT;
-  }
-
-  return PL_DHASH_NEXT;
-}
-
 NS_IMETHODIMP
-nsCertOverrideService::GetPermanentOverrideCount(uint32_t* aOverrideCount)
+nsCertOverrideService::GetAllOverrideHostsWithPorts(uint32_t *aCount, 
+                                                        char16_t ***aHostsWithPortsArray)
 {
-  NS_ENSURE_ARG(aOverrideCount);
-  *aOverrideCount = 0;
-
-  ReentrantMonitorAutoEnter lock(monitor);
-  mSettingsTable.EnumerateEntries(CountPermanentEntriesCallback, aOverrideCount);
-
-  return NS_OK;
+  return NS_ERROR_NOT_IMPLEMENTED;
 }
 
 static bool
diff --git a/security/manager/ssl/src/nsNSSComponent.cpp b/security/manager/ssl/src/nsNSSComponent.cpp
index afca6ea29200..772959da9c18 100644
--- a/security/manager/ssl/src/nsNSSComponent.cpp
+++ b/security/manager/ssl/src/nsNSSComponent.cpp
@@ -1049,20 +1049,6 @@ nsNSSComponent::InitializeNSS()
     return NS_ERROR_FAILURE;
   }
 
-  nsCOMPtr<nsICertOverrideService> overrideService(
-    do_GetService(NS_CERTOVERRIDE_CONTRACTID));
-  if (!overrideService) {
-    PR_LOG(gPIPNSSLog, PR_LOG_DEBUG, ("Failed to initialize cert override service\n"));
-    return NS_ERROR_FAILURE;
-  }
-
-  uint32_t overrideCount = 0;
-  rv = overrideService->GetPermanentOverrideCount(&overrideCount);
-  if (NS_FAILED(rv)) {
-    return rv;
-  }
-  Telemetry::Accumulate(Telemetry::SSL_PERMANENT_CERT_ERROR_OVERRIDES,
-                        overrideCount);
 
   PR_LOG(gPIPNSSLog, PR_LOG_DEBUG, ("NSS Initialization done\n"));
   return NS_OK;
diff --git a/toolkit/components/telemetry/Histograms.json b/toolkit/components/telemetry/Histograms.json
index da7e9ce0d1f5..ca830eb48a37 100644
--- a/toolkit/components/telemetry/Histograms.json
+++ b/toolkit/components/telemetry/Histograms.json
@@ -6459,13 +6459,6 @@
     "n_values": 24,
     "description": "Was a certificate error overridden on this handshake? What was it? (0=unknown error (indicating bug), 1=no, >1=a specific error)"
   },
-  "SSL_PERMANENT_CERT_ERROR_OVERRIDES": {
-    "expires_in_version": "never",
-    "kind": "exponential",
-    "high": 1024,
-    "n_buckets": 10,
-    "description": "How many permanent certificate overrides a user has stored."
-  },
   "TELEMETRY_TEST_EXPIRED": {
     "expires_in_version": "4.0a1",
     "kind": "flag",