diff --git a/application/palemoon/app/profile/palemoon.js b/application/palemoon/app/profile/palemoon.js
index 69f8f6651a..907ac1fbf0 100644
--- a/application/palemoon/app/profile/palemoon.js
+++ b/application/palemoon/app/profile/palemoon.js
@@ -1152,19 +1152,6 @@ pref("toolkit.pageThumbs.minHeight", 180);
 pref("ui.key.menuAccessKeyFocuses", true);
 #endif
 
-// ****************** domain-specific UAs ******************
-
-// AMO needs "Firefox", obviously - pass on the OS (determined at build time)
-#ifdef XP_UNIX
-#ifdef XP_MACOSX
-pref("general.useragent.override.addons.mozilla.org","Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8; rv:27.0) Gecko/20100101 Firefox/27.0");
-#else
-pref("general.useragent.override.addons.mozilla.org","Mozilla/5.0 (Linux; X11; rv:27.0) Gecko/20100101 Firefox/27.0");
-#endif
-#else
-pref("general.useragent.override.addons.mozilla.org","Mozilla/5.0 (Windows NT 6.1; WOW64; rv:27.0) Gecko/20100101 Firefox/27.0");
-#endif
-
 // ****************** s4e prefs ******************
 pref("status4evar.addonbar.borderStyle", false);
 pref("status4evar.addonbar.closeButton", false);
diff --git a/application/palemoon/branding/shared/pref/uaoverrides.inc b/application/palemoon/branding/shared/pref/uaoverrides.inc
index c86475dd0d..0222c04357 100644
--- a/application/palemoon/branding/shared/pref/uaoverrides.inc
+++ b/application/palemoon/branding/shared/pref/uaoverrides.inc
@@ -21,6 +21,11 @@
 #define OS_SLICE Windows NT 6.1; WOW64;
 #endif
 
+// Special-case AMO
+// We send the native UA slice now, since they no longer offer any compatible extensions for us.
+// This will result in an "only with Firefox" message which suits us fine, because it's the truth.
+pref("@GUAO_PREF@.addons.mozilla.org","Mozilla/5.0 (@OS_SLICE@ rv:@GRE_VERSION@) @GRE_DATE_SLICE@ @PM_SLICE@");
+
 // Required for domains that have proven unresponsive to requests from users
 pref("@GUAO_PREF@.live.com","Mozilla/5.0 (@OS_SLICE@ rv:@GK_VERSION@) @GK_SLICE@ @FX_SLICE@ (Pale Moon)");
 pref("@GUAO_PREF@.msn.com","Mozilla/5.0 (@OS_SLICE@ rv:@GK_VERSION@) @GK_SLICE@ @FX_SLICE@ (Pale Moon)");