diff --git a/userChrome.css b/userChrome.css
index bc1093de..f2feb110 100644
--- a/userChrome.css
+++ b/userChrome.css
@@ -6,8 +6,12 @@
 :root[lwtheme-mozlightdark]:not([lwthemetextcolor="bright"]) {
   --lwt-accent-color: rgb(229, 229, 235) !important; /* Original: rgb(240, 240, 244) */
 }
-@media not all and ((-moz-os-version: windows-win7) or (-moz-os-version: windows-win8) or (-moz-gtk-csd-available)) {
-  /*  Level 4  */
+@media (-moz-os-version: windows-win10) {
+  :root[lwtheme-mozlightdark]:not([lwthemetextcolor="bright"]) #navigator-toolbox {
+    background-color: var(--lwt-accent-color) !important;
+  }
+}
+@supports -moz-bool-pref("layout.css.osx-font-smoothing.enabled") {
   :root[lwtheme-mozlightdark]:not([lwthemetextcolor="bright"]) #navigator-toolbox {
     background-color: var(--lwt-accent-color) !important;
   }
@@ -2059,7 +2063,7 @@ browser[type="content"] > html {
       --organizer-pane-field-border-color: ThreeDShadow;
     }
 
-    @media not (prefers-contrast) {
+    @media not all and (prefers-contrast) {
       :root {
         --organizer-color: var(--in-content-page-color);
         --organizer-deemphasized-color: var(--in-content-deemphasized-text);
diff --git a/userContent.css b/userContent.css
index 8ddbb3db..2fb1f2ea 100644
--- a/userContent.css
+++ b/userContent.css
@@ -1807,7 +1807,7 @@
       --organizer-pane-field-border-color: ThreeDShadow;
     }
 
-    @media not (prefers-contrast) {
+    @media not all and (prefers-contrast) {
       :root {
         --organizer-color: var(--in-content-page-color);
         --organizer-deemphasized-color: var(--in-content-deemphasized-text);