diff --git a/content/xbl/builtin/mac/platformHTMLBindings.xml b/content/xbl/builtin/mac/platformHTMLBindings.xml
index 9847652a6561..450367d193ce 100644
--- a/content/xbl/builtin/mac/platformHTMLBindings.xml
+++ b/content/xbl/builtin/mac/platformHTMLBindings.xml
@@ -41,6 +41,11 @@
       <handler event="keypress" keycode="VK_UP"   modifiers="accel,shift" command="cmd_selectTop"/>
       <handler event="keypress" keycode="VK_DOWN" modifiers="accel,shift" command="cmd_selectBottom"/>
 
+      <handler event="keypress" keycode="VK_UP"   modifiers="alt" command="cmd_movePageUp"/>
+      <handler event="keypress" keycode="VK_DOWN" modifiers="alt" command="cmd_movePageDown"/>
+      <handler event="keypress" keycode="VK_UP"   modifiers="alt,shift" command="cmd_selectPageUp"/>
+      <handler event="keypress" keycode="VK_DOWN" modifiers="alt,shift" command="cmd_selectPageDown"/>
+
       <handler event="keypress" keycode="VK_LEFT"  modifiers="alt" command="cmd_wordPrevious"/>
       <handler event="keypress" keycode="VK_RIGHT" modifiers="alt" command="cmd_wordNext"/>
       <handler event="keypress" keycode="VK_LEFT"  modifiers="alt,shift" command="cmd_selectWordPrevious"/>