diff --git a/browser/extensions/newtab/content-src/components/DiscoveryStreamComponents/AdBannerContextMenu/AdBannerContextMenu.scss b/browser/extensions/newtab/content-src/components/DiscoveryStreamComponents/AdBannerContextMenu/AdBannerContextMenu.scss
index 10ec3e3a5b16..0585d0d3cccc 100644
--- a/browser/extensions/newtab/content-src/components/DiscoveryStreamComponents/AdBannerContextMenu/AdBannerContextMenu.scss
+++ b/browser/extensions/newtab/content-src/components/DiscoveryStreamComponents/AdBannerContextMenu/AdBannerContextMenu.scss
@@ -8,11 +8,11 @@
   position: relative;
 
   .context-menu {
-    width: auto;
-
     /* Position the menu just under and to the right of the context menu button */
+    inset-inline-end: 100%;
+    inset-inline-start: auto;
+    margin-inline-end: calc(-0.98 * var(--size-item-large));
     top: calc(2.25 * var(--size-item-small));
-    inset-inline-start: calc(-12.25 * var(--size-item-small));
   }
 
   > moz-button {
diff --git a/browser/extensions/newtab/css/activity-stream.css b/browser/extensions/newtab/css/activity-stream.css
index 75f57ca26bd0..f9df067ea143 100644
--- a/browser/extensions/newtab/css/activity-stream.css
+++ b/browser/extensions/newtab/css/activity-stream.css
@@ -8108,10 +8108,11 @@ main section {
   position: relative;
 }
 .ads-context-menu .context-menu {
-  width: auto;
   /* Position the menu just under and to the right of the context menu button */
+  inset-inline-end: 100%;
+  inset-inline-start: auto;
+  margin-inline-end: calc(-0.98 * var(--size-item-large));
   top: calc(2.25 * var(--size-item-small));
-  inset-inline-start: calc(-12.25 * var(--size-item-small));
 }
 .ads-context-menu > moz-button {
   padding-block-end: var(--space-small);