diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..1957c5b
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "ffdemo/vendor"]
+	path = ffdemo/vendor
+	url = git://github.com/mozilla/markup-lib.git
diff --git a/ffdemo/vendor b/ffdemo/vendor
new file mode 160000
index 0000000..8e05d2a
--- /dev/null
+++ b/ffdemo/vendor
@@ -0,0 +1 @@
+Subproject commit 8e05d2ac4eb603b97ec3c53eb3f7e9ae15fa215d