Fix some issues I guess idk

Author: K4sum1

browser/themes/shared/r3dfox.css

@@ -574,13 +574,16 @@
 
   #alltabs-button::after {
   padding: 4px 4px 4px 0px !important;
-  @media (-moz-platform: windows-xp), (-moz-windows-classic) {
-    padding: 6px 5px 5px 0px !important;
-  }
   border-radius: 0px 4px 4px 0px !important;
   background-clip: padding-box !important;
   }
 
+  @media (-moz-platform: windows-winxp), (-moz-windows-classic) {
+    #alltabs-button::after {
+      padding: 6px 5px 5px 0px !important;
+    }
+  }
+
   /* WHY THE FUCK DOES light-dark NOT WORK HERE?!?!?!? */
   /* Probably not going to need menubar shit below, commented out for now */
 

browser/themes/windows/browser.css

@@ -166,7 +166,7 @@
 /* add extra margin for unmaximized windows
    on Win XP Luna themes to look consistent */
 @media not (-moz-windows-classic) {
-  @media (-moz-platform: windows-xp) {
+  @media (-moz-platform: windows-winxp) {
     :root[tabsintitlebar]:not([sizemode="maximized"]) .titlebar-buttonbox-container {
       margin-top: 4px;
     }