1 files changed, 6 insertions, 2 deletions
diff --git a/toolkit/components/printing/content/printPreviewBindings.xml b/toolkit/components/printing/content/printPreviewBindings.xml
index 182ecc199..c33b22e36 100644
--- a/toolkit/components/printing/content/printPreviewBindings.xml
+++ b/toolkit/components/printing/content/printPreviewBindings.xml
@@ -161,10 +161,14 @@
 
           let $ = id => document.getAnonymousElementByAttribute(this, "anonid", id);
           let ltr = document.documentElement.matches(":root:-moz-locale-dir(ltr)");
+#ifdef XP_WIN
           // Windows 7 doesn't support ⏮ and ⏭ by default, and fallback doesn't
           // always work (bug 1343330).
-          let {AppConstants} = Components.utils.import("resource://gre/modules/AppConstants.jsm", {});
-          let useCompatCharacters = AppConstants.isPlatformAndVersionAtMost("win", "6.1");
+          let useCompatCharacters = Services.vc.compare(Services.sysinfo.getProperty("version"), "6.1") <= 0;
+#else
+          let useCompatCharacters = false;
+#endif
+
           let leftEnd = useCompatCharacters ? "⏪" : "⏮";
           let rightEnd = useCompatCharacters ? "⏩" : "⏭";
           $("navigateHome").label = ltr ? leftEnd : rightEnd;