diff --git a/styles/notion.css b/styles/notion.css
index 3567354..20285f1 100644
--- a/styles/notion.css
+++ b/styles/notion.css
@@ -327,11 +327,18 @@
 }
 
 .dark-mode .notion-header {
-  background: hsla(203, 8%, 20%, 0.8);
+  background: transparent;
   box-shadow: inset 0 -1px 0 0 rgba(0, 0, 0, 0.1);
   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;