Taking into account the fact that FF nightlies include the local SSRCs in the local SDP.

libs/strophe/strophe.jingle.adapter.js

@@ -529,7 +529,10 @@ function setupRTC() {
                 },
                 pc_constraints: {},
                 getLocalSSRC: function (session, callback) {
-                    session.peerconnection.getStats(function (s) {
+                    // NOTE(gp) latest FF nightlies seem to provide the local
+                    // SSRCs in their SDP so there's no longer necessary to
+                    // take it from the peer connection stats.
+                    /*session.peerconnection.getStats(function (s) {
                             var ssrcs = {};
                             s.forEach(function (item) {
                                 if (item.type == "outboundrtp" && !item.isRemote)
@@ -545,7 +548,8 @@ function setupRTC() {
                         },
                         function () {
                             callback(null);
-                        });
+                        });*/
+                    callback(null);
                 },
                 getStreamID: function (stream) {
                     var tracks = stream.getVideoTracks();
@@ -584,7 +588,9 @@ function setupRTC() {
                 callback(null);
             },
             getStreamID: function (stream) {
-                return stream.id;
+                // streams from FF endpoints have the characters '{' and '}'
+                // that make jQuery choke.
+                return stream.id.replace(/[\{,\}]/g,"");
             },
             getVideoSrc: function (element) {
                 return element.getAttribute("src");