--- a/browser/themes/windows/browser-aero.css
+++ b/browser/themes/windows/browser-aero.css
@@ -341,18 +341,16 @@
     .searchbar-textbox:not(:-moz-lwtheme)[focused] {
       background-color: hsla(0,0%,100%,1);
       border-color: #4595e5;
     }
 
     /* Introducing an additional hover state for the Bookmark button */
     #nav-bar .toolbarbutton-1[buttonover] > .toolbarbutton-menubutton-button:hover > .toolbarbutton-icon {
       background-color: hsla(210,4%,10%,.08);
-      -moz-border-end: 1px solid;
-      -moz-padding-end: 5px;
       border-color: hsla(210,4%,10%,.1);
     }
   }
 }
 
 /* ::::: fullscreen window controls ::::: */
 
 #window-controls {

--- a/browser/themes/windows/browser.css
+++ b/browser/themes/windows/browser.css
@@ -666,17 +666,17 @@ toolbarbutton[sdk-button="true"][cui-are
   background-size: 1px 16px;
 }
 
 @conditionalForwardWithUrlbar@ > .toolbarbutton-1:-moz-any([disabled],:not([open]):not([disabled]):not(:active)) > .toolbarbutton-icon {
   border-color: hsla(210,4%,10%,.1);
 }
 
 #nav-bar .toolbarbutton-1:not([disabled=true]):-moz-any(:hover,[open]) > .toolbarbutton-menubutton-button > .toolbarbutton-icon,
-#nav-bar .toolbarbutton-1:not([disabled=true]):hover > .toolbarbutton-menubutton-dropmarker > .dropmarker-icon,
+#nav-bar .toolbarbutton-1:not([disabled=true]):-moz-any(:hover,[open]) > .toolbarbutton-menubutton-dropmarker > .dropmarker-icon,
 #nav-bar .toolbarbutton-1:not([disabled=true]):not([checked]):not([open]):not(:active):hover > .toolbarbutton-icon,
 #nav-bar .toolbarbutton-1:not([disabled=true]):not([checked]):not([open]):not(:active):hover > .toolbarbutton-text,
 #nav-bar .toolbarbutton-1:not([disabled=true]):not([checked]):not([open]):not(:active):hover > .toolbarbutton-badge-container,
 @conditionalForwardWithUrlbar@ > #forward-button:not([open]):not(:active):not([disabled]):hover > .toolbarbutton-icon,
 #nav-bar .toolbarbutton-1:not([buttonover]):not([open]):not(:active):hover > .toolbarbutton-menubutton-dropmarker:not([disabled]) > .dropmarker-icon {
   background-color: hsla(210,4%,10%,.08);
   border-color: hsla(210,4%,10%,.1);
 }