diff --git a/netwerk/base/public/nsIIOService.idl b/netwerk/base/public/nsIIOService.idl
index 3e9070ccb4f..d028829f5d6 100644
--- a/netwerk/base/public/nsIIOService.idl
+++ b/netwerk/base/public/nsIIOService.idl
@@ -106,6 +106,11 @@ interface nsIIOService : nsISupports
      */
     boolean isAppOffline(in uint32_t appId);
 
+    /**
+     * Returns the state of the app with the given appId.
+     * returns nsIAppOfflineInfo::{ONLINE,OFFLINE,WIFI_ONLY}
+     */
+    long getAppOfflineState(in uint32_t appId);
 
     /**
      * Checks if a port number is banned. This involves consulting a list of
diff --git a/netwerk/base/src/nsIOService.cpp b/netwerk/base/src/nsIOService.cpp
index e4d27ddb98b..e89e3062244 100644
--- a/netwerk/base/src/nsIOService.cpp
+++ b/netwerk/base/src/nsIOService.cpp
@@ -1505,6 +1505,22 @@ nsIOService::SetAppOfflineInternal(uint32_t aAppId, int32_t aState)
 
 }
 
+NS_IMETHODIMP
+nsIOService::GetAppOfflineState(uint32_t aAppId, int32_t *aResult)
+{
+    NS_ENSURE_ARG(aResult);
+
+    if (aAppId == NECKO_NO_APP_ID ||
+        aAppId == NECKO_UNKNOWN_APP_ID) {
+        return NS_ERROR_NOT_AVAILABLE;
+    }
+
+    *aResult = nsIAppOfflineInfo::ONLINE;
+    mAppsOfflineStatus.Get(aAppId, aResult);
+
+    return NS_OK;
+}
+
 NS_IMETHODIMP
 nsIOService::IsAppOffline(uint32_t aAppId, bool* aResult)
 {