Bug 848141 - "Translation file "toolbox.properties" has no license block" [r=past]

browser/locales/en-US/chrome/browser/devtools/toolbox.properties

@@ -1,3 +1,7 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
 toolboxDockButtons.bottom.tooltip=Dock to bottom of browser window
 toolboxDockButtons.side.tooltip=Dock to side of browser window
 toolboxDockButtons.window.tooltip=Show in separate window