Bug #361702 --> nsIIOService::SetManageOfflineStatus throws a JS error on platforms that don't support nsINetworkLinkService. sr=bienvenu

mail/app/profile/all-thunderbird.js

@@ -246,7 +246,12 @@ pref("offline.send.unsent_messages",            0);
 // 2 Never synchronize the offline store when going offline
 pref("offline.download.download_messages",  0);
 pref("offline.prompt_synch_on_exit",            true);
-pref("offline.autoDetect",                      true); // automatically move the user offline or online based on the network connection
+
+#ifdef XP_WIN
+pref("offline.autoDetect", true); // automatically move the user offline or online based on the network connection
+#else
+pref("offline.autoDetect", false);
+#endif
 
 // Expose only select protocol handlers. All others should go
 // through the external protocol handler route.

mailnews/extensions/offline-startup/js/offlineStartup.js

@@ -68,13 +68,7 @@ var nsOfflineStartup =
     {
       gStartingUp = false;
       // if checked, the "work offline" checkbox overrides
-      var managingOffineStatus = false;
-      try 
-      {
-        managingOffineStatus = ioService.manageOfflineStatus;
-      } catch (ex) {} // the getter for ioService.manageOfflineStatus throws an exception on platforms that don't support it.
-      
-      if (ioService.offline && !managingOffineStatus) 
+      if (ioService.offline && !ioService.manageOfflineStatus) 
       {
         debug("already offline!");
         return;