diff --git a/src/img/container-site-light.svg b/src/img/container-site-light.svg
new file mode 100644
index 0000000..9d5e4c3
--- /dev/null
+++ b/src/img/container-site-light.svg
@@ -0,0 +1,3 @@
+<svg width="16px" height="16px" viewBox="0 0 16 16" version="1.1" xmlns="http://www.w3.org/2000/svg">
+  <path fill="context-fill #bebebe" fill-opacity="context-fill-opacity" d="M12.9137931,3.0862069 L12.9137931,1.27586207 C12.9137931,0.84736528 12.5664278,0.5 12.137931,0.5 C11.7094342,0.5 11.362069,0.84736528 11.362069,1.27586207 L11.362069,1.27586207 L11.362069,3.0862069 L9.55172414,3.0862069 C9.12322735,3.0862069 8.77586207,3.43357218 8.77586207,3.86206897 C8.77586207,4.29056575 9.12322735,4.63793103 9.55172414,4.63793103 L11.362069,4.63793103 L11.362069,6.44827586 C11.362069,6.87677265 11.7094342,7.22413793 12.137931,7.22413793 L12.137931,7.22413793 C12.5664278,7.22413793 12.9137931,6.87677265 12.9137931,6.44827586 L12.9137931,6.44827586 L12.9137931,4.63793103 L14.7241379,4.63793103 C15.1526347,4.63793103 15.5,4.29056575 15.5,3.86206897 L15.5,3.86206897 C15.5,3.43357218 15.1526347,3.0862069 14.7241379,3.0862069 L14.7241379,3.0862069 L12.9137931,3.0862069 Z M0.5,9.76803178 C0.5,9.22007158 0.94118947,8.77586207 1.49216971,8.77586207 L6.23196822,8.77586207 C6.77992842,8.77586207 7.22413793,9.21705154 7.22413793,9.76803178 L7.22413793,14.5078303 C7.22413793,15.0557905 6.78294846,15.5 6.23196822,15.5 L1.49216971,15.5 C0.94420951,15.5 0.5,15.0588105 0.5,14.5078303 L0.5,9.76803178 Z M8.77586207,9.76803178 C8.77586207,9.22007158 9.21705154,8.77586207 9.76803178,8.77586207 L14.5078303,8.77586207 C15.0557905,8.77586207 15.5,9.21705154 15.5,9.76803178 L15.5,14.5078303 C15.5,15.0557905 15.0588105,15.5 14.5078303,15.5 L9.76803178,15.5 C9.22007158,15.5 8.77586207,15.0588105 8.77586207,14.5078303 L8.77586207,9.76803178 Z M0.5,1.49216971 C0.5,0.94420951 0.94118947,0.5 1.49216971,0.5 L6.23196822,0.5 C6.77992842,0.5 7.22413793,0.94118947 7.22413793,1.49216971 L7.22413793,6.23196822 C7.22413793,6.77992842 6.78294846,7.22413793 6.23196822,7.22413793 L1.49216971,7.22413793 C0.94420951,7.22413793 0.5,6.78294846 0.5,6.23196822 L0.5,1.49216971 Z"></path>
+</svg>
\ No newline at end of file
diff --git a/src/manifest.json b/src/manifest.json
index 29915b0..136cd82 100644
--- a/src/manifest.json
+++ b/src/manifest.json
@@ -47,7 +47,12 @@
     "browser_style": true,
     "default_icon": "img/container-site.svg",
     "default_title": "Multi-Account Containers",
-    "default_popup": "popup.html"
+    "default_popup": "popup.html",
+    "theme_icons": [{
+        "light": "img/container-site-light.svg",
+        "dark": "img/container-site.svg",
+        "size": 32
+    }]
   },
 
   "background": {