diff --git a/frontend/src/common.js b/frontend/src/common.js
index 27e9e5fa..bd49f149 100644
--- a/frontend/src/common.js
+++ b/frontend/src/common.js
@@ -8,4 +8,25 @@ window.analytics = new testPilotGA({
   an: 'Firefox Send',
   ds: 'web',
   tid: window.trackerId
-});
\ No newline at end of file
+});
+
+const isSender = location.pathname.includes('/download');
+
+gcmCompliant().catch(err => {
+  $('#page-one').attr('hidden', true);
+  $('#download').attr('hidden', true);
+  sendEvent(isSender ? 'sender' : 'recipient', 'unsupported', {
+    cd6: err
+  }).then(() => {
+    location.replace('/unsupported');
+  });
+});
+
+if (navigator.userAgent.toLowerCase().indexOf('firefox') > -1 &&
+    parseInt(navigator.userAgent.toLowerCase().match(/firefox\/*([^\n\r]*)\./)[1]) <= 49) {
+    sendEvent(isSender ? 'sender' : 'recipient', 'unsupported', {
+      cd6: new Error('Firefox is outdated.')
+    }).then(() => {
+      location.replace('/unsupported');
+    });
+}
\ No newline at end of file
diff --git a/frontend/src/download.js b/frontend/src/download.js
index 2268fc86..224d3731 100644
--- a/frontend/src/download.js
+++ b/frontend/src/download.js
@@ -8,25 +8,6 @@ const storage = new Storage(localStorage);
 const $ = require('jquery');
 require('jquery-circle-progress');
 
-gcmCompliant().catch(err => {
-  $('#page-one').attr('hidden', true);
-  $('#download').attr('hidden', true);
-  sendEvent('recipient', 'unsupported', {
-    cd6: err
-  }).then(() => {
-    location.replace('/unsupported');
-  });
-});
-
-if (navigator.userAgent.toLowerCase().indexOf('firefox') > -1 &&
-    parseInt(navigator.userAgent.toLowerCase().match(/firefox\/*([^\n\r]*)\./)[1]) <= 49) {
-    sendEvent('recipient', 'unsupported', {
-      cd6: new Error('Firefox is outdated.')
-    }).then(() => {
-      location.replace('/unsupported');
-    });
-}
-
 const Raven = window.Raven;
 
 $(document).ready(function() {
diff --git a/frontend/src/upload.js b/frontend/src/upload.js
index 0d283f88..bb1c3f55 100644
--- a/frontend/src/upload.js
+++ b/frontend/src/upload.js
@@ -11,26 +11,6 @@ const bytes = require('bytes');
 const Storage = require('./storage');
 const storage = new Storage(localStorage);
 
-gcmCompliant().catch(err => {
-  $('#page-one').attr('hidden', true);
-  $('#download').attr('hidden', true);
-  sendEvent('sender', 'unsupported', {
-    cd6: err
-  }).then(() => {
-    location.replace('/unsupported');
-  });
-});
-
-if (navigator.userAgent.toLowerCase().indexOf('firefox') > -1 &&
-    parseInt(navigator.userAgent.toLowerCase().match(/firefox\/*([^\n\r]*)\./)[1]) <= 49) {
-    sendEvent('sender', 'unsupported', {
-      cd6: new Error('Firefox is outdated.')
-    }).then(() => {
-      location.replace('/unsupported');
-    });
-}
-
-
 const $ = require('jquery');
 require('jquery-circle-progress');