diff -Nru mozilla-devscripts-0.32/debian/changelog mozilla-devscripts-0.32+rpi1/debian/changelog
--- mozilla-devscripts-0.32/debian/changelog	2012-05-23 21:50:23.000000000 +0000
+++ mozilla-devscripts-0.32+rpi1/debian/changelog	2014-03-20 22:10:44.000000000 +0000
@@ -1,3 +1,11 @@
+mozilla-devscripts (0.32+rpi1) wheezy-staging; urgency=medium
+
+  * Use dpkg-vendor --derives-from Ubuntu instead of dpkg-vendor --query vendor
+    in dh_xul-ext so Ubuntu derivatives get treated like Ubuntu and non-ubuntu
+    based debian derivatives get treated like debian.
+
+ -- Peter Michael Green <plugwash@raspbian.org>  Thu, 20 Mar 2014 22:10:25 +0000
+
 mozilla-devscripts (0.32) unstable; urgency=low
 
   * dh_xul-ext: Do not generate a Breaks entry for Firefox/Iceweasel 10 or
diff -Nru mozilla-devscripts-0.32/dh_xul-ext mozilla-devscripts-0.32+rpi1/dh_xul-ext
--- mozilla-devscripts-0.32/dh_xul-ext	2012-05-23 19:27:17.000000000 +0000
+++ mozilla-devscripts-0.32+rpi1/dh_xul-ext	2014-03-20 22:10:44.000000000 +0000
@@ -120,9 +120,18 @@
     if _VENDOR_ENV in os.environ:
         vendor = os.environ[_VENDOR_ENV]
     else:
-        cmd = ["dpkg-vendor", "--query", "Vendor"]
-        process = subprocess.Popen(cmd, stdout=subprocess.PIPE)
-        vendor = process.communicate()[0].strip()
+        #cmd = ["dpkg-vendor", "--query", "Vendor"]
+        #process = subprocess.Popen(cmd, stdout=subprocess.PIPE)
+        #vendor = process.communicate()[0].strip()
+        #Use dpkg-vendor --derives-from Ubuntu rathe than dpkg-vendor --query
+        #So Ubuntu derivatives get treated like ubuntu and non-ubuntu based
+        #Debian derivatives get treated like Debian.
+        cmd = ["dpkg-vendor", "--derives-from", "Ubuntu"]
+        retval = subprocess.call(cmd);
+        if (retval == 0):
+             vendor = "Ubuntu"
+        else: 
+             vendor = "Debian"
     return vendor
 
 def get_xul_apps(script_name, all_distros):