diff --git a/toolkit/components/places/nsPlacesAutoComplete.js b/toolkit/components/places/nsPlacesAutoComplete.js
index c817e046985..c6d709833b8 100644
--- a/toolkit/components/places/nsPlacesAutoComplete.js
+++ b/toolkit/components/places/nsPlacesAutoComplete.js
@@ -8,6 +8,8 @@ Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
 Components.utils.import("resource://gre/modules/Services.jsm");
 XPCOMUtils.defineLazyModuleGetter(this, "PlacesUtils",
                                   "resource://gre/modules/PlacesUtils.jsm");
+XPCOMUtils.defineLazyModuleGetter(this, "TelemetryStopwatch",
+                                  "resource://gre/modules/TelemetryStopwatch.jsm");
 
 ////////////////////////////////////////////////////////////////////////////////
 //// Constants
@@ -77,6 +79,9 @@ const kBrowserUrlbarAutofillPref = "autoFill";
 // Whether to search only typed entries.
 const kBrowserUrlbarAutofillTypedPref = "autoFill.typed";
 
+// The Telemetry histogram for urlInlineComplete query on domain
+const DOMAIN_QUERY_TELEMETRY = "PLACES_AUTOCOMPLETE_URLINLINE_DOMAIN_QUERY_TIME_MS";
+
 ////////////////////////////////////////////////////////////////////////////////
 //// Globals
 
@@ -1391,7 +1396,11 @@ urlInlineComplete.prototype = {
     if (lastSlashIndex == -1) {
       var hasDomainResult = false;
       var domain, untrimmedDomain;
+      TelemetryStopwatch.start(DOMAIN_QUERY_TELEMETRY);
       try {
+        // Execute the query synchronously.
+        // This is by design, to avoid race conditions between the
+        // user typing and the connection searching for the result.
         hasDomainResult = query.executeStep();
         if (hasDomainResult) {
           domain = query.getString(0);
@@ -1400,6 +1409,7 @@ urlInlineComplete.prototype = {
       } finally {
         query.reset();
       }
+      TelemetryStopwatch.finish(DOMAIN_QUERY_TELEMETRY);
 
       if (hasDomainResult) {
         // We got a match for a domain, we can add it immediately.
diff --git a/toolkit/components/telemetry/Histograms.json b/toolkit/components/telemetry/Histograms.json
index dd2c779d12e..e815aefb3a8 100644
--- a/toolkit/components/telemetry/Histograms.json
+++ b/toolkit/components/telemetry/Histograms.json
@@ -1833,6 +1833,13 @@
     "n_buckets": 10,
     "description": "PLACES: Time for first autocomplete result if > 50ms (ms)"
   },
+  "PLACES_AUTOCOMPLETE_URLINLINE_DOMAIN_QUERY_TIME_MS": {
+    "kind": "exponential",
+    "low": 50,
+    "high": 2000,
+    "n_buckets": 10,
+    "description": "PLACES: Duration of the domain query for the url inline autocompletion (ms)"
+  },
   "PLACES_IDLE_FRECENCY_DECAY_TIME_MS": {
     "kind": "exponential",
     "low": 50,