diff --git a/js/background.js b/js/background.js
index c9f8de8..5dbf34b 100644
--- a/js/background.js
+++ b/js/background.js
@@ -31,6 +31,21 @@ chrome.tabs.onUpdated.addListener(function (tabId, changeInfo) {
         })
 })
 
+// Detect shopping tab becoming inactive/closed, if the domain matches a shopping site, play music
+chrome.tabs.onActivated.addListener(function(activeInfo) {
+  chrome.tabs.get(activeInfo.tabId, function(tab) {
+    var url = new URL(tab.url)
+    var domain = url.hostname.toString().replace('www.','')
+    console.log(domain)
+    if (!siteList.includes(domain)) {
+        themeAudio.pause()
+    }
+    else {
+      themeAudio.play()
+    }
+  })
+})
+
 // Show notification on extension install
 chrome.runtime.onInstalled.addListener(function() {
     chrome.notifications.create({
@@ -39,4 +54,4 @@ chrome.runtime.onInstalled.addListener(function() {
         'title': 'Wii Shop Music extension installed!',
         'message': 'The Wii Shop theme will now play when you visit shopping websites.'
       })
-})
\ No newline at end of file
+})
diff --git a/js/site-list.js b/js/site-list.js
index 986ce73..6a5bf70 100644
--- a/js/site-list.js
+++ b/js/site-list.js
@@ -13,6 +13,21 @@ const siteList = [
     'amazon.nl',
     'amazon.es',
     'amazon.co.uk',
+    'smile.amazon.co.uk',
+    'smile.amazon.com',
+    'smile.amazon.com.au',
+    'smile.amazon.com.br',
+    'smile.amazon.ca',
+    'smile.amazon.cn',
+    'smile.amazon.fr',
+    'smile.amazon.de',
+    'smile.amazon.in',
+    'smile.amazon.it',
+    'smile.amazon.co.jp',
+    'smile.amazon.com.mx',
+    'smile.amazon.nl',
+    'smile.amazon.es',
+    'smile.amazon.co.uk',
     'bestbuy.com',
     'bhphotovideo.com',
     'canadacomputers.com',