diff --git a/gecko_fingerprint.sh b/gecko_fingerprint.sh
new file mode 100755
index 0000000000000000000000000000000000000000..f3993c0b7dd0e291e13f737b0e6593181808dc57
--- /dev/null
+++ b/gecko_fingerprint.sh
@@ -0,0 +1,53 @@
+#!/bin/bash
+#
+# Copyright (c) 2013, The Linux Foundation. All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+#       copyright notice, this list of conditions and the following
+#       disclaimer in the documentation and/or other materials provided
+#       with the distribution.
+#     * Neither the name of The Linux Foundation nor the names of its
+#       contributors may be used to endorse or promote products derived
+#       from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+# WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+# BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+# OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+# IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+
+IMPORTANT_IDLS=$(cat <<EOF
+  content/base/public/nsIMessageManager.idl
+  dom/interfaces/settings/nsISettingsService.idl
+  dom/messages/interfaces/nsISystemMessagesInternal.idl
+  dom/sms/interfaces/nsIDOMSmsMessage.idl
+  dom/sms/interfaces/nsISmsRequest.idl
+  dom/sms/interfaces/nsIRilSmsDatabaseService.idl
+  dom/sms/interfaces/nsISmsService.idl
+  dom/system/gonk/nsIAudioManager.idl
+  dom/system/gonk/nsIRadioInterfaceLayer.idl
+  dom/time/nsITimeService.idl
+  xpcom/system/nsIGeolocationProvider.idl
+EOF
+)
+
+for IDL in $IMPORTANT_IDLS; do
+  if [ ! -f $IDL ]; then
+    echo $IDL not found. >&2
+    exit 1
+  fi
+done
+
+cat $IMPORTANT_IDLS | cpp -P 2> /dev/null | openssl sha1