--- a/browser/themes/linux/searchbar.css
+++ b/browser/themes/linux/searchbar.css
@@ -219,17 +219,17 @@ menuitem[cmd="cmd_clearhistory"][disable
 .search-panel-one-offs[compact=true] > .searchbar-engine-one-off-item.dummy:not(.last-of-row),
 .search-panel-one-offs[compact=true] > .searchbar-engine-one-off-item.last-engine,
 .search-setting-button-compact {
   background-image: none;
 }
 
 .searchbar-engine-one-off-item:not([selected]):not(.dummy):hover,
 .addengine-item:hover {
-  background-color: hsla(0, 0%, 0%, 0.06);
+  background-color: hsla(0, 0%, 0%, 0.1);
   color: inherit;
 }
 
 .searchbar-engine-one-off-item[selected] {
   background-color: Highlight;
   background-image: none;
   color: HighlightText;
 }

--- a/browser/themes/osx/searchbar.css
+++ b/browser/themes/osx/searchbar.css
@@ -208,17 +208,17 @@
 .search-panel-one-offs[compact=true] > .searchbar-engine-one-off-item.dummy:not(.last-of-row),
 .search-panel-one-offs[compact=true] > .searchbar-engine-one-off-item.last-engine,
 .search-setting-button-compact {
   background-image: none;
 }
 
 .searchbar-engine-one-off-item:not([selected]):not(.dummy):hover,
 .addengine-item:hover {
-  background-color: hsla(0, 0%, 0%, 0.06);
+  background-color: hsla(0, 0%, 0%, 0.1);
   color: inherit;
 }
 
 .searchbar-engine-one-off-item[selected] {
   background-color: Highlight;
   background-image: none;
   color: HighlightText;
 }

--- a/browser/themes/windows/searchbar.css
+++ b/browser/themes/windows/searchbar.css
@@ -220,17 +220,17 @@
 .search-panel-one-offs[compact=true] > .searchbar-engine-one-off-item.dummy:not(.last-of-row),
 .search-panel-one-offs[compact=true] > .searchbar-engine-one-off-item.last-engine,
 .search-setting-button-compact {
   background-image: none;
 }
 
 .searchbar-engine-one-off-item:not([selected]):not(.dummy):hover,
 .addengine-item:hover {
-  background-color: hsla(0, 0%, 0%, 0.06);
+  background-color: hsla(0, 0%, 0%, 0.1);
   color: inherit;
 }
 
 .searchbar-engine-one-off-item[selected] {
   background-color: Highlight;
   background-image: none;
   color: HighlightText;
 }