--- a/netwerk/system/linux/nsNotifyAddrListener_Linux.cpp
+++ b/netwerk/system/linux/nsNotifyAddrListener_Linux.cpp
@@ -261,30 +261,30 @@ void nsNotifyAddrListener::calculateNetw
     nsAutoCString newString(reinterpret_cast<char*>(digest),
                             SHA1Sum::kHashSize);
     nsresult rv = Base64Encode(newString, output);
     MOZ_RELEASE_ASSERT(NS_SUCCEEDED(rv));
     LOG(("networkid: id %s\n", output.get()));
     if (mNetworkId != output) {
       // new id
       if (found4 && !found6) {
-        Telemetry::Accumulate(Telemetry::NETWORK_ID, 1);  // IPv4 only
+        Telemetry::Accumulate(Telemetry::NETWORK_ID2, 1);  // IPv4 only
       } else if (!found4 && found6) {
-        Telemetry::Accumulate(Telemetry::NETWORK_ID, 3);  // IPv6 only
+        Telemetry::Accumulate(Telemetry::NETWORK_ID2, 3);  // IPv6 only
       } else {
-        Telemetry::Accumulate(Telemetry::NETWORK_ID, 4);  // Both!
+        Telemetry::Accumulate(Telemetry::NETWORK_ID2, 4);  // Both!
       }
       mNetworkId = output;
     } else {
       // same id
-      Telemetry::Accumulate(Telemetry::NETWORK_ID, 2);
+      Telemetry::Accumulate(Telemetry::NETWORK_ID2, 2);
     }
   } else {
     // no id
-    Telemetry::Accumulate(Telemetry::NETWORK_ID, 0);
+    Telemetry::Accumulate(Telemetry::NETWORK_ID2, 0);
   }
 }
 
 //
 // Check if there's a network interface available to do networking on.
 //
 void nsNotifyAddrListener::checkLink(void) {
   struct ifaddrs* list;

--- a/netwerk/system/mac/nsNetworkLinkService.mm
+++ b/netwerk/system/mac/nsNetworkLinkService.mm
@@ -329,30 +329,30 @@ void nsNetworkLinkService::calculateNetw
     sha1.finish(digest);
     nsAutoCString newString(reinterpret_cast<char*>(digest), SHA1Sum::kHashSize);
     nsresult rv = Base64Encode(newString, output);
     MOZ_RELEASE_ASSERT(NS_SUCCEEDED(rv));
     LOG(("networkid: id %s\n", output.get()));
     if (mNetworkId != output) {
       // new id
       if (found4 && !found6) {
-        Telemetry::Accumulate(Telemetry::NETWORK_ID, 1);  // IPv4 only
+        Telemetry::Accumulate(Telemetry::NETWORK_ID2, 1);  // IPv4 only
       } else if (!found4 && found6) {
-        Telemetry::Accumulate(Telemetry::NETWORK_ID, 3);  // IPv6 only
+        Telemetry::Accumulate(Telemetry::NETWORK_ID2, 3);  // IPv6 only
       } else {
-        Telemetry::Accumulate(Telemetry::NETWORK_ID, 4);  // Both!
+        Telemetry::Accumulate(Telemetry::NETWORK_ID2, 4);  // Both!
       }
       mNetworkId = output;
     } else {
       // same id
-      Telemetry::Accumulate(Telemetry::NETWORK_ID, 2);
+      Telemetry::Accumulate(Telemetry::NETWORK_ID2, 2);
     }
   } else {
     // no id
-    Telemetry::Accumulate(Telemetry::NETWORK_ID, 0);
+    Telemetry::Accumulate(Telemetry::NETWORK_ID2, 0);
   }
 }
 
 NS_IMETHODIMP
 nsNetworkLinkService::Observe(nsISupports* subject, const char* topic, const char16_t* data) {
   if (!strcmp(topic, "xpcom-shutdown")) {
     Shutdown();
   }

--- a/netwerk/system/win32/nsNotifyAddrListener.cpp
+++ b/netwerk/system/win32/nsNotifyAddrListener.cpp
@@ -207,21 +207,21 @@ bool nsNotifyAddrListener::findMac(char*
           nsresult rv = Base64Encode(newString, output);
           if (NS_FAILED(rv)) {
             found = false;
             break;
           }
           LOG(("networkid: id %s\n", output.get()));
           if (mNetworkId != output) {
             // new id
-            Telemetry::Accumulate(Telemetry::NETWORK_ID, 1);
+            Telemetry::Accumulate(Telemetry::NETWORK_ID2, 1);
             mNetworkId = output;
           } else {
             // same id
-            Telemetry::Accumulate(Telemetry::NETWORK_ID, 2);
+            Telemetry::Accumulate(Telemetry::NETWORK_ID2, 2);
           }
           found = true;
           break;
         }
       }
     }
   }
   return found;
@@ -276,17 +276,17 @@ static bool defaultgw(char* aGateway, si
 void nsNotifyAddrListener::calculateNetworkId(void) {
   bool found = FALSE;
   char gateway[128];
   if (defaultgw(gateway, sizeof(gateway))) {
     found = findMac(gateway);
   }
   if (!found) {
     // no id
-    Telemetry::Accumulate(Telemetry::NETWORK_ID, 0);
+    Telemetry::Accumulate(Telemetry::NETWORK_ID2, 0);
   }
 }
 
 // Static Callback function for NotifyIpInterfaceChange API.
 static void WINAPI OnInterfaceChange(PVOID callerContext,
                                      PMIB_IPINTERFACE_ROW row,
                                      MIB_NOTIFICATION_TYPE notificationType) {
   nsNotifyAddrListener* notify =

--- a/toolkit/components/telemetry/Histograms.json
+++ b/toolkit/components/telemetry/Histograms.json
@@ -4827,24 +4827,24 @@
   "NETWORK_DISK_CACHE2_SHUTDOWN_CLEAR_PRIVATE": {
     "record_in_processes": ["main", "content"],
     "expires_in_version": "never",
     "kind": "exponential",
     "high": 10000,
     "n_buckets": 10,
     "description": "Time spent (ms) during showdown deleting disk cache v2 for 'clear private data' option"
   },
-  "NETWORK_ID": {
-    "record_in_processes": ["main", "content"],
+  "NETWORK_ID2": {
+    "record_in_processes": ["main"],
     "alert_emails": ["necko@mozilla.com"],
-    "bug_numbers": [1240932],
+    "bug_numbers": [1240932, 1395914],
     "expires_in_version": "never",
     "kind": "enumerated",
     "n_values": 6,
-    "description": "Network identification (0=None, 1=New, 2=Same)"
+    "description": "Network identification (0=None, 1=New Ipv4, 2=Same, 3=New IPv6, 4=New dual)"
   },
   "IDLE_NOTIFY_IDLE_MS": {
     "record_in_processes": ["main", "content"],
     "alert_emails": ["froydnj@mozilla.com"],
     "bug_numbers": [731004],
     "expires_in_version": "default",
     "kind": "exponential",
     "high": 5000,