Add resource count and timing to Browsertime

pageTiming.js

diff --git a/browserscripts/timings/pageTimings.js b/browserscripts/timings/pageTimings.js
index b6e753ce..60b7cc60 100644
--- a/browserscripts/timings/pageTimings.js
+++ b/browserscripts/timings/pageTimings.js
@@ -1,5 +1,12 @@
 (function() {
   const t = window.performance.getEntriesByType('navigation')[0];
+  
+  const resources = performance.getEntriesByType("resource");
+  let resourceDuration = 0;
+  for (let i = 0; i < resources.length; i++) {
+    resourceDuration += resources[i].duration;
+  }
+
   const d = 0;
   return {
     domainLookupTime: Number(
@@ -13,6 +20,8 @@
     domContentLoadedTime: Number(t.domContentLoadedEventStart.toFixed(d)),
     pageLoadTime: Number(t.loadEventStart.toFixed(d)),
     frontEndTime: Number((t.loadEventStart - t.responseEnd).toFixed(d)),
-    backEndTime: Number(t.responseStart.toFixed(d))
+    backEndTime: Number(t.responseStart.toFixed(d)),
+    resourceCount: Number(resources.length),
+    resourceDuration: Number(resourceDuration)
   };
 })();