diff --git a/browser/base/content/sanitize.js b/browser/base/content/sanitize.js
index 6da116fd3b9d..2e01cbd2f21b 100644
--- a/browser/base/content/sanitize.js
+++ b/browser/base/content/sanitize.js
@@ -180,6 +180,7 @@ Sanitizer.prototype = {
       clear: function ()
       {
         TelemetryStopwatch.start("FX_SANITIZE_COOKIES");
+        TelemetryStopwatch.start("FX_SANITIZE_COOKIES_2");
 
         var cookieMgr = Components.classes["@mozilla.org/cookiemanager;1"]
                                   .getService(Ci.nsICookieManager);
@@ -199,12 +200,15 @@ Sanitizer.prototype = {
           cookieMgr.removeAll();
         }
 
+        TelemetryStopwatch.finish("FX_SANITIZE_COOKIES_2");
+
         // Clear deviceIds. Done asynchronously (returns before complete).
         let mediaMgr = Components.classes["@mozilla.org/mediaManagerService;1"]
                                  .getService(Ci.nsIMediaManagerService);
         mediaMgr.sanitizeDeviceIds(this.range && this.range[0]);
 
         // Clear plugin data.
+        TelemetryStopwatch.start("FX_SANITIZE_PLUGINS");
         const phInterface = Ci.nsIPluginHost;
         const FLAG_CLEAR_ALL = phInterface.FLAG_CLEAR_ALL;
         let ph = Cc["@mozilla.org/plugin/host;1"].getService(phInterface);
@@ -234,6 +238,7 @@ Sanitizer.prototype = {
           }
         }
 
+        TelemetryStopwatch.finish("FX_SANITIZE_PLUGINS");
         TelemetryStopwatch.finish("FX_SANITIZE_COOKIES");
       },
 
diff --git a/toolkit/components/telemetry/Histograms.json b/toolkit/components/telemetry/Histograms.json
index 56b6f8c0a6a7..3a398c945d0c 100644
--- a/toolkit/components/telemetry/Histograms.json
+++ b/toolkit/components/telemetry/Histograms.json
@@ -7844,6 +7844,24 @@
     "extended_statistics_ok": true,
     "description": "Sanitize: Time it takes to sanitize cookies (ms)"
   },
+  "FX_SANITIZE_COOKIES_2": {
+    "alert_emails": ["firefox-dev@mozilla.org"],
+    "expires_in_version": "50",
+    "kind": "exponential",
+    "high": "30000",
+    "n_buckets": 20,
+    "extended_statistics_ok": true,
+    "description": "Sanitize: Time it takes to sanitize firefox cookies (ms). A subset of FX_SANITIZE_COOKIES."
+  },
+  "FX_SANITIZE_PLUGINS": {
+    "alert_emails": ["firefox-dev@mozilla.org"],
+    "expires_in_version": "50",
+    "kind": "exponential",
+    "high": "30000",
+    "n_buckets": 20,
+    "extended_statistics_ok": true,
+    "description": "Sanitize: Time it takes to sanitize plugin cookies (ms). A subset of FX_SANITIZE_COOKIES."
+  },
   "FX_SANITIZE_OFFLINEAPPS": {
     "alert_emails": ["firefox-dev@mozilla.org", "gavin@mozilla.com"],
     "expires_in_version": "50",