diff --git a/Formula/xulrunner.rb b/Formula/xulrunner.rb
index 2d65529aa9..9d9502d98f 100644
--- a/Formula/xulrunner.rb
+++ b/Formula/xulrunner.rb
@@ -34,12 +34,13 @@ end
 
 class Xulrunner < Formula
   homepage "https://developer.mozilla.org/docs/XULRunner"
-  url "http://ftp.mozilla.org/pub/mozilla.org/xulrunner/releases/27.0/source/xulrunner-27.0.source.tar.bz2"
-  sha1 "fbce25e33aea4291d83e8d5420a870b5e29371ec"
+  url "http://ftp.mozilla.org/pub/mozilla.org/xulrunner/releases/27.0.1/source/xulrunner-27.0.1.source.tar.bz2"
+  sha1 'c9c5a6142fc9c50113c18eb8b1fb9249c08c4aac'
 
   devel do
-    url "http://ftp.mozilla.org/pub/mozilla.org/xulrunner/releases/28.0b1/source/xulrunner-28.0b1.source.tar.bz2"
-    sha1 "ede3088dae3023e4ad42615d07112565bbd54e3c"
+    url "http://ftp.mozilla.org/pub/mozilla.org/xulrunner/releases/28.0b3/source/xulrunner-28.0b3.source.tar.bz2"
+    sha1 'f35c986e2889dcee1d9f458ff7942ec6d3b1bbe9'
+    version '28.0b3'
   end
 
   head do
@@ -97,12 +98,13 @@ class Xulrunner < Formula
     frameworks.mkpath
     if build.head?
       # update HEAD version here with every version bump
-      system "tar", "-xvj", "-C", frameworks, "-f",
-                    "objdir/dist/xulrunner-30.0a1.en-US.mac64.tar.bz2"
+      tar_path = "objdir/dist/xulrunner-30.0a1.en-US.mac64.tar.bz2"
+    elsif build.devel?
+      tar_path = "objdir/dist/xulrunner-#{version.to_s[/\d+.\d/]}.en-US.mac64.tar.bz2"
     else
-      system "tar", "-xvj", "-C", frameworks, "-f",
-                    "objdir/dist/xulrunner-#{version.to_s[/\d+.\d/]}.en-US.mac64.tar.bz2"
+      tar_path = "objdir/dist/xulrunner-#{version}.en-US.mac64.tar.bz2"
     end
+    system "tar", "-xvj", "-C", frameworks, "-f", tar_path
 
     # symlink only xulrunner here will fail (assumes dylibs in same directory)
     bin.write_exec_script frameworks/"XUL.framework/Versions/Current/xulrunner"