diff --git a/.gitignore b/.gitignore
index a06382c..e44b7da 100644
--- a/.gitignore
+++ b/.gitignore
@@ -48,3 +48,5 @@ firefox-3.6.4.source.tar.bz2
 /firefox-langpacks-13.0.1-20120616.tar.xz
 /firefox-14.0.1.source.tar.bz2
 /firefox-langpacks-14.0.1-20120716.tar.xz
+/firefox-15.0.source.tar.bz2
+/firefox-langpacks-15.0-20120827.tar.xz
diff --git a/firefox.spec b/firefox.spec
index b264999..0514463 100644
--- a/firefox.spec
+++ b/firefox.spec
@@ -16,7 +16,7 @@
 %define default_bookmarks_file %{_datadir}/bookmarks/default-bookmarks.html
 %define firefox_app_id \{ec8030f7-c20a-464f-9b0e-13a3a9e97384\}
 
-%global xulrunner_version      14.0.1
+%global xulrunner_version      15.0
 %global xulrunner_release      1
 %global alpha_version          0
 %global beta_version           0
@@ -51,14 +51,14 @@
 
 Summary:        Mozilla Firefox Web browser
 Name:           firefox
-Version:        14.0.1
-Release:        3%{?pre_tag}%{?dist}
+Version:        15.0
+Release:        1%{?pre_tag}%{?dist}
 URL:            http://www.mozilla.org/projects/firefox/
 License:        MPLv1.1 or GPLv2+ or LGPLv2+
 Group:          Applications/Internet
 Source0:        ftp://ftp.mozilla.org/pub/firefox/releases/%{version}%{?pre_version}/source/firefox-%{version}%{?pre_version}.source.tar.bz2
 %if %{build_langpacks}
-Source1:        firefox-langpacks-%{version}%{?pre_version}-20120716.tar.xz
+Source1:        firefox-langpacks-%{version}%{?pre_version}-20120827.tar.xz
 %endif
 Source10:       firefox-mozconfig
 Source11:       firefox-mozconfig-branded
@@ -393,6 +393,9 @@ gtk-update-icon-cache %{_datadir}/icons/hicolor &>/dev/null || :
 #---------------------------------------------------------------------
 
 %changelog
+* Mon Aug 27 2012 Martin Stransky <stransky@redhat.com> - 15.0-1
+- update 15.0
+
 * Wed Aug 22 2012 Dan Horák <dan[at]danny.cz> - 14.0.1-3
 - add fix for secondary arches from xulrunner
 
diff --git a/sources b/sources
index 5f04ddb..2e13308 100644
--- a/sources
+++ b/sources
@@ -1,2 +1,2 @@
-c2f884f0f6c41c65cf20f678a1ee7191  firefox-14.0.1.source.tar.bz2
-5b9d27ba6054b9c81e41572898fb813d  firefox-langpacks-14.0.1-20120716.tar.xz
+64220887a349515f16e5aa990acb4db3  firefox-15.0.source.tar.bz2
+8b93954aa49bff344386b03977b81409  firefox-langpacks-15.0-20120827.tar.xz