diff --git a/browser/themes/shared/preferences/preferences.css b/browser/themes/shared/preferences/preferences.css
index b3e2500f05f0..db2c6432244a 100644
--- a/browser/themes/shared/preferences/preferences.css
+++ b/browser/themes/shared/preferences/preferences.css
@@ -856,6 +856,7 @@ dialog > .sync-engines-list + hbox {
 
 .sync-engines-list > div:not([hidden]) {
   display: flex;
+  break-inside: avoid;
 }
 
 .sync-engine-bookmarks .checkbox-icon,