diff --git a/chrome/vertical_urlbar_one-off_items.css b/chrome/vertical_urlbar_one-off_items.css
new file mode 100644
index 0000000..e884a7c
--- /dev/null
+++ b/chrome/vertical_urlbar_one-off_items.css
@@ -0,0 +1,32 @@
+/* Source file https://github.com/MrOtherGuy/firefox-csshacks/tree/master/chrome/vertical_urlbar_one-off_items.css made available under Mozilla Public License v. 2.0
+See the above repository for updates as well as full license text. */
+
+/* Makes one-off search buttons in the urlbar popup show vertically to the right of results */
+
+#urlbar[open="true"] > .urlbarView{
+  display: flex !important;
+}
+.urlbarView-body-outer{
+  width: calc(100% - 2 * (5px + var(--urlbar-container-padding)) - 30px); !important;
+}
+#urlbar .search-one-offs{
+  width: 40px !important;
+  flex-direction: column;
+  align-items: stretch !important;
+}
+.search-panel-one-offs,
+.search-panel-one-offs-container{
+  flex-direction: column !important;
+  min-width: unset !important;
+  align-items: stretch !important;
+  justify-content: start !important;
+}
+#urlbar .searchbar-engine-one-off-item{
+  min-width: unset !important;
+  margin-inline: 0 !important;
+  align-self: unset !important;
+}
+.search-panel-one-offs .searchbar-engine-one-off-item{
+  min-height: 40px !important;
+}
+.search-panel-one-offs-header{ display: none !important }
diff --git a/html_resources/tagmap.json b/html_resources/tagmap.json
index 9feba85..547b792 100644
--- a/html_resources/tagmap.json
+++ b/html_resources/tagmap.json
@@ -156,5 +156,6 @@
 "vertical_popup_menubar.css":["menubar","menu","toolbars","popup"],
 "window_control_fallback_for_custom_windows_theme.css":["window-control","buttons","colors","patch"],
 "window_control_force_linux_system_style.css":["window-control","buttons","icon"],
-"window_control_placeholder_support.css":["window-control","patch"]
+"window_control_placeholder_support.css":["window-control","patch"],
+"vertical_urlbar_one-off_items.css":["urlbar"]
 }
diff --git a/tags.csv b/tags.csv
index b139af9..82b40d0 100644
--- a/tags.csv
+++ b/tags.csv
@@ -156,3 +156,4 @@ vertical_popup_menubar.css,menubar,menu,toolbars,popup
 window_control_fallback_for_custom_windows_theme.css,window-control,buttons,colors,patch
 window_control_force_linux_system_style.css,window-control,buttons,icon
 window_control_placeholder_support.css,window-control,patch
+vertical_urlbar_one-off_items.css,urlbar