diff -r 000000000000 -r 6474c204b198 dom/locales/en-US/chrome/layout/xul.properties
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/locales/en-US/chrome/layout/xul.properties	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,8 @@
+# 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/.
+
+MissingOverlay=Failed to load overlay from %1$S.
+PINotInProlog=<?%1$S?> processing instruction does not have any effect outside the prolog anymore (see bug 360119).
+NeededToWrapXUL=XUL box for %1$S element contained an inline %2$S child, forcing all its children to be wrapped in a block.
+NeededToWrapXULInlineBox=XUL box for %1$S element contained an inline %2$S child, forcing all its children to be wrapped in a block.  This can often be fixed by replacing "display: -moz-inline-box" with "display: -moz-inline-box; display: inline-block".