diff --git a/frontend/src/common.js b/frontend/src/common.js
index ecee7102..851eef19 100644
--- a/frontend/src/common.js
+++ b/frontend/src/common.js
@@ -3,7 +3,7 @@ window.Raven.config(window.dsn).install();
 window.dsn = undefined;
 
 const testPilotGA = require('testpilot-ga');
-const {gcmCompliant, sendEvent} = require('./utils');
+const { gcmCompliant, sendEvent } = require('./utils');
 window.analytics = new testPilotGA({
   an: 'Firefox Send',
   ds: 'web',
@@ -11,20 +11,24 @@ window.analytics = new testPilotGA({
 });
 
 const isSender = !location.pathname.includes('/download');
+const ec = isSender ? 'sender' : 'recipient';
+const ua = navigator.userAgent.toLowerCase();
 
 gcmCompliant().catch(err => {
-  sendEvent(isSender ? 'sender' : 'recipient', 'unsupported', {
+  sendEvent(ec, 'unsupported', {
     cd6: err
   }).then(() => {
     location.replace('/unsupported/gcm');
   });
 });
 
-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-      cd6: new Error('Firefox is outdated.')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-      location.replace('/unsupported/outdated');
-    });
-}
\ No newline at end of file
+if (
+  ua.indexOf('firefox') > -1 &&
+  parseInt(ua.match(/firefox\/*([^\n\r]*)\./)[1], 10) <= 49
+) {
+  sendEvent(ec, 'unsupported', {
+    cd6: new Error('Firefox is outdated.')
+  }).then(() => {
+    location.replace('/unsupported/outdated');
+  });
+}
diff --git a/test/frontend/driver.js b/test/frontend/driver.js
index 13ca26e1..a9630333 100644
--- a/test/frontend/driver.js
+++ b/test/frontend/driver.js
@@ -2,9 +2,7 @@ const webdriver = require('selenium-webdriver');
 const path = require('path');
 const until = webdriver.until;
 
-const driver = new webdriver.Builder()
-  .forBrowser('firefox')
-  .build();
+const driver = new webdriver.Builder().forBrowser('firefox').build();
 
 driver.get(path.join('file:///', __dirname, '/frontend.test.html'));
 driver.wait(until.titleIs('Mocha Tests'));
@@ -15,8 +13,10 @@ driver.getTitle().then(title => {
     if (title === '0') {
       console.log('Frontend tests have passed.');
     } else {
-      throw new Error('Frontend tests are failing. ' + 
-                'Please open the frontend.test.html file in a browser.');
+      throw new Error(
+        'Frontend tests are failing. ' +
+          'Please open the frontend.test.html file in a browser.'
+      );
     }
-  })
-})
\ No newline at end of file
+  });
+});