diff --git a/firefox_preferences/chrome/userContent.css b/firefox_preferences/chrome/userContent.css
new file mode 100644
index 00000000..34714f91
--- /dev/null
+++ b/firefox_preferences/chrome/userContent.css
@@ -0,0 +1,3 @@
+:root {
+  scrollbar-color: #2c77ac #2c77ac;
+}