--- a/netwerk/protocol/http/HttpChannelParent.cpp
+++ b/netwerk/protocol/http/HttpChannelParent.cpp
@@ -1640,26 +1640,34 @@ HttpChannelParent::OnStopRequest(nsIRequ
 
     isLocal = isLocal || IsLoopBackAddress(&peerAddr);
 
     if (!isLocal) {
       if (!mHasSuspendedByBackPressure) {
         AccumulateCategorical(Telemetry::LABELS_NETWORK_BACK_PRESSURE_SUSPENSION_RATE_V2::NotSuspended);
       } else {
         AccumulateCategorical(Telemetry::LABELS_NETWORK_BACK_PRESSURE_SUSPENSION_RATE_V2::Suspended);
+
+        // Only analyze non-local suspended cases, which we are interested in.
+        nsCOMPtr<nsILoadInfo> loadInfo;
+        if (NS_SUCCEEDED(mChannel->GetLoadInfo(getter_AddRefs(loadInfo)))) {
+          nsContentPolicyType type = loadInfo ?
+                                     loadInfo->InternalContentPolicyType() :
+                                     nsIContentPolicy::TYPE_OTHER;
+          Telemetry::Accumulate(Telemetry::NETWORK_BACK_PRESSURE_SUSPENSION_CP_TYPE, type);
+        }
       }
     } else {
       if (!mHasSuspendedByBackPressure) {
         AccumulateCategorical(Telemetry::LABELS_NETWORK_BACK_PRESSURE_SUSPENSION_RATE_V2::NotSuspendedLocal);
       } else {
         AccumulateCategorical(Telemetry::LABELS_NETWORK_BACK_PRESSURE_SUSPENSION_RATE_V2::SuspendedLocal);
       }
     }
   }
-
   return NS_OK;
 }
 
 //-----------------------------------------------------------------------------
 // HttpChannelParent::nsIStreamListener
 //-----------------------------------------------------------------------------
 
 NS_IMETHODIMP

--- a/toolkit/components/telemetry/Histograms.json
+++ b/toolkit/components/telemetry/Histograms.json
@@ -2002,16 +2002,25 @@
     "record_in_processes": ["main"],
     "expires_in_version": "68",
     "alert_emails": ["necko@mozilla.com", "junior@mozilla.com"],
     "bug_numbers": [1280629, 1494133],
     "kind": "categorical",
     "labels": ["Suspended", "NotSuspended", "SuspendedLocal", "NotSuspendedLocal"],
     "description": "Collect whether the resource is suspended by back pressure. And split by local-ness."
   },
+  "NETWORK_BACK_PRESSURE_SUSPENSION_CP_TYPE": {
+    "record_in_processes": ["main"],
+    "expires_in_version": "68",
+    "alert_emails": ["necko@mozilla.com", "junior@mozilla.com"],
+    "bug_numbers": [1487559],
+    "kind": "enumerated",
+    "n_values": 64,
+    "description": "Collect the content policy when the resource is non-local and suspended by back pressure (0-44 from nsContentPolicyType in nsIContentPolicy.idl)."
+  },
   "NETWORK_HTTP_REDIRECT_TO_SCHEME" :{
     "record_in_processes": ["main"],
     "alert_emails": ["necko@mozilla.com", "seceng-telemetry@mozilla.com", "jkt@mozilla.com"],
     "bug_numbers": [1413512],
     "expires_in_version": "64",
     "kind": "categorical",
     "keyed": true,
     "description": "Count of the HTTP redirection that triggered by top-level document or by subresource, keyed by the URL scheme redirected to.",