687295 - disable websockets deprecated deflate-stream extension due to thin vnc interop problem r=bz

content/base/test/test_websocket.html

@@ -1067,7 +1067,7 @@ function test38()
   {
     ok(true, "test 38 open");
     ok(ws.extensions != undefined, "extensions attribute defined");
-    ok(ws.extensions == "deflate-stream", "extensions attribute deflate-stream");
+//    ok(ws.extensions == "deflate-stream", "extensions attribute deflate-stream");
     ws.close();
   };
 

modules/libpref/src/init/all.js

@@ -820,8 +820,10 @@ pref("network.websocket.timeout.ping.request", 0);
 pref("network.websocket.timeout.ping.response", 10);
 
 // Defines whether or not to try and negotiate the stream-deflate compression
-// extension with the websocket server
-pref("network.websocket.extensions.stream-deflate", true);
+// extension with the websocket server. Stream-Deflate has been removed from
+// the standards track document, but can still be used by servers who opt
+// into it.
+pref("network.websocket.extensions.stream-deflate", false);
 
 // the maximum number of concurrent websocket sessions. By specification there
 // is never more than one handshake oustanding to an individual host at