diff --git a/mobile/chrome/content/browser.js b/mobile/chrome/content/browser.js
index 52959a919575..4df414783e35 100644
--- a/mobile/chrome/content/browser.js
+++ b/mobile/chrome/content/browser.js
@@ -2323,7 +2323,7 @@ ProgressController.prototype = {
 };
 
 var OfflineApps = {
-  offlineAppRequested: function(aRequest) {
+  offlineAppRequested: function(aRequest, aTarget) {
     if (!Services.prefs.getBoolPref("browser.offline-apps.notify"))
       return;
 
@@ -2356,7 +2356,7 @@ var OfflineApps = {
         accessKey: null,
         callback: function() {
           for (let i = 0; i < notification.documents.length; i++)
-            OfflineApps.allowSite(notification.documents[i]);
+            OfflineApps.allowSite(notification.documents[i], aTarget);
         }
       },{
         label: strings.getString("offlineApps.never"),
@@ -2379,13 +2379,14 @@ var OfflineApps = {
     }
   },
 
-  allowSite: function(aRequest) {
+  allowSite: function(aRequest, aTarget) {
     let currentURI = Services.io.newURI(aRequest.location, aRequest.charset, null);
     Services.perms.add(currentURI, "offline-app", Ci.nsIPermissionManager.ALLOW_ACTION);
 
     // When a site is enabled while loading, manifest resources will start
     // fetching immediately.  This one time we need to do it ourselves.
-    this._startFetching(aRequest);
+    // The update must be started on the content process.
+    aTarget.messageManager.sendAsyncMessage("Browser:MozApplicationCache:Fetch", aRequest);
   },
 
   disallowSite: function(aRequest) {
@@ -2393,17 +2394,9 @@ var OfflineApps = {
     Services.perms.add(currentURI, "offline-app", Ci.nsIPermissionManager.DENY_ACTION);
   },
 
-  _startFetching: function(aRequest) {
-    let currentURI = Services.io.newURI(aRequest.location, aRequest.charset, null);
-    let manifestURI = Services.io.newURI(aRequest.manifest, aRequest.charset, currentURI);
-
-    let updateService = Cc["@mozilla.org/offlinecacheupdate-service;1"].getService(Ci.nsIOfflineCacheUpdateService);
-    updateService.scheduleUpdate(manifestURI, currentURI);
-  },
-
   receiveMessage: function receiveMessage(aMessage) {
     if (aMessage.name == "Browser:MozApplicationManifest") {
-      this.offlineAppRequested(aMessage.json);
+      this.offlineAppRequested(aMessage.json, aMessage.target);
     }
   }
 };
diff --git a/mobile/chrome/content/content.js b/mobile/chrome/content/content.js
index bf4aa4673923..972620123d34 100644
--- a/mobile/chrome/content/content.js
+++ b/mobile/chrome/content/content.js
@@ -293,6 +293,7 @@ function Content() {
   addMessageListener("Browser:MouseUp", this);
   addMessageListener("Browser:SaveAs", this);
   addMessageListener("Browser:ZoomToPoint", this);
+  addMessageListener("Browser:MozApplicationCache:Fetch", this);
 
   if (Util.isParentProcess())
     addEventListener("DOMActivate", this, true);
@@ -454,6 +455,15 @@ Content.prototype = {
         sendAsyncMessage("Browser:ZoomToPoint:Return", { x: x, y: y, rect: rect });
         break;
       }
+      
+      case "Browser:MozApplicationCache:Fetch": {
+        let currentURI = Services.io.newURI(json.location, json.charset, null);
+        let manifestURI = Services.io.newURI(json.manifest, json.charset, currentURI);
+        let updateService = Cc["@mozilla.org/offlinecacheupdate-service;1"]
+                            .getService(Ci.nsIOfflineCacheUpdateService);
+        updateService.scheduleUpdate(manifestURI, currentURI, content);
+        break;
+      }
     }
   },