Update instructions to build the Firefox add-on.
diff --git a/BUILD b/BUILD
index e329bfb..45de260 100644
--- a/BUILD
+++ b/BUILD
@@ -17,7 +17,6 @@
build and install Node.js (often on the machine also running the ccnd you wish to proxy
for, but that doesn't have to be the case). See wsproxy/README.md
-THE FIREFOX PLUG-IN. [Instructions to come.]
-
-
-
+THE FIREFOX ADD-ON.
+If the compressed library js/tools/build/ndn-js.js is out of date, first build it (see above).
+Go to js/ndnProtocol and run make-ndnProtocol.sh which makes js/ndnProtocol.xpi .