Bug 1294873 - Skip test_websocket-server.html on osx, to avoid intermittent leaks; r=me, a=test-only

devtools/server/tests/mochitest/chrome.ini

@@ -107,4 +107,4 @@ skip-if = !e10s # test is designed to work on e10s only
 [test_webextension-addon-debugging-reload.html]
 skip-if = !e10s # test is designed to work on e10s only
 [test_websocket-server.html]
-skip-if = false
+skip-if = os == 'mac' # bug 1294873 intermittent leaks