diff --git a/res/css/_common.scss b/res/css/_common.scss
index d6f85edb86..a05ec7eadd 100644
--- a/res/css/_common.scss
+++ b/res/css/_common.scss
@@ -45,6 +45,8 @@ html {
        N.B. Breaks things when we have legitimate horizontal overscroll */
     height: 100%;
     overflow: hidden;
+    // Stop similar overscroll bounce in Firefox Nightly for macOS
+    overscroll-behavior: none;
 }
 
 body {