-It requires headers and libraries for gtkmm and Mozilla. I have
-developed and tested it with gtkmm 2.2.12 and Mozilla 1.7.8 but it may
-well work with earlier or later versions of these.
+It requires headers and libraries for gtkmm, Mozilla or XULRunner, and
+expat. I am currently building and testing it with gtkmm 2.8.8,
+XULRunner 1.8.0.11 and expat 1.95.8. It may well work with earlier or
+later versions of these, but Mozilla 1.7 and gtkmm 2.0 and 2.2 are no
+longer supported.