diff --git a/browser/layout/partials/ctm.html b/browser/layout/partials/ctm.html
index 7ddd90887..ded4efad5 100644
--- a/browser/layout/partials/ctm.html
+++ b/browser/layout/partials/ctm.html
@@ -3,10 +3,9 @@
 classes = classes.replace(/\bno-js\b/, 'js'); {{!note: needed for JS that's run out of the scope of the bootstrap (inline onclicks, etc)}}
 
 var getRandomValuesAvailable;
-try {
-	getRandomValuesAvailable = 'getRandomValues' in window.crypto
-} catch (e) {
-	getRandomValuesAvailable = 'getRandomValues' in window.msCrypto
+var cryptoApi = window.crypto || window.msCrypto;
+if (cryptoApi) {
+	getRandomValuesAvailable = 'getRandomValues' in cryptoApi;
 }
 
 window.cutsTheMustard = (