Fixed bug 435103 (https://bugzilla.mozilla.org/show_bug.cgi?id=435103)

services/sync/modules/service.js

@@ -74,6 +74,7 @@ Utils.lazy(Weave, 'Service', WeaveSvc);
  */
 
 function WeaveSvc() {
+  this._startupFinished = false;
   this._initLogs();
   this._log.info("Weave Sync Service Initializing");
 
@@ -167,6 +168,15 @@ WeaveSvc.prototype = {
     return Utils.prefs.getIntPref("schedule");
   },
 
+  onWindowOpened: function Weave__onWindowOpened() {
+    if (!this._startupFinished &&
+        Utils.prefs.getBoolPref("autoconnect") &&
+        this.username && this.username != 'nobody@mozilla.com') {
+      this._startupFinished = true;
+      this.login();
+    }
+  },
+
   _setSchedule: function Weave__setSchedule(schedule) {
     switch (this.schedule) {
     case 0: