diff --git a/styles/notion.css b/styles/notion.css
index 460440d..20285f1 100644
--- a/styles/notion.css
+++ b/styles/notion.css
@@ -332,6 +332,13 @@
   backdrop-filter: saturate(180%) blur(8px);
 }
 
+/* Workaround for Firefox not supporting backdrop-filter yet */
+@-moz-document url-prefix() {
+  .dark-mode .notion-header {
+    background: hsla(203, 8%, 20%, 0.8);
+  }
+}
+
 .notion-bookmark:hover {
   border-image: linear-gradient(90.68deg, #b439df 0.26%, #e5337e 102.37%);
   border-image-slice: 1;