--- a/browser/base/content/aboutSocialError.xhtml
+++ b/browser/base/content/aboutSocialError.xhtml
@@ -37,37 +37,36 @@
     Cu.import("resource://gre/modules/Services.jsm");
     Cu.import("resource:///modules/Social.jsm");
 
     let config = {
       tryAgainCallback: reloadProvider
     }
 
     function parseQueryString() {
-      let url = document.documentURI;
-      let queryString = url.replace(/^about:socialerror\??/, "");
-
-      let modeMatch = queryString.match(/mode=([^&]+)/);
-      let mode = modeMatch && modeMatch[1] ? modeMatch[1] : "";
-      let originMatch = queryString.match(/origin=([^&]+)/);
-      config.origin = originMatch && originMatch[1] ? decodeURIComponent(originMatch[1]) : "";
+      let searchParams = new URLSearchParams(location.href.split("?")[1]);
+      let mode = searchParams.get("mode");
+      config.directory = searchParams.get("directory");
+      config.origin = searchParams.get("origin");
+      let encodedURL = searchParams.get("url");
+      let url = decodeURIComponent(encodedURL);
+      if (config.directory) {
+        let URI = Services.io.newURI(url, null, null);
+        config.origin = Services.scriptSecurityManager.getNoAppCodebasePrincipal(URI).origin;
+      }
 
       switch (mode) {
         case "compactInfo":
           document.getElementById("btnTryAgain").style.display = 'none';
           document.getElementById("btnCloseSidebar").style.display = 'none';
           break;
         case "tryAgainOnly":
           document.getElementById("btnCloseSidebar").style.display = 'none';
           //intentional fall-through
         case "tryAgain":
-          let urlMatch = queryString.match(/url=([^&]+)/);
-          let encodedURL = urlMatch && urlMatch[1] ? urlMatch[1] : "";
-          url = decodeURIComponent(encodedURL);
-
           config.tryAgainCallback = loadQueryURL;
           config.queryURL = url;
           break;
         case "workerFailure":
           config.tryAgainCallback = reloadProvider;
           break;
         default:
           break;
@@ -75,17 +74,17 @@
     }
 
     function setUpStrings() {
       let brandBundle = Services.strings.createBundle("chrome://branding/locale/brand.properties");
       let browserBundle = Services.strings.createBundle("chrome://browser/locale/browser.properties");
 
       let productName = brandBundle.GetStringFromName("brandShortName");
       let provider = Social._getProviderFromOrigin(config.origin);
-      let providerName = provider && provider.name;
+      let providerName = provider ? provider.name : config.origin;
 
       // Sets up the error message
       let msg = browserBundle.formatStringFromName("social.error.message", [productName, providerName], 2);
       document.getElementById("main-error-msg").textContent = msg;
 
       // Sets up the buttons' labels and accesskeys
       let btnTryAgain = document.getElementById("btnTryAgain");
       btnTryAgain.textContent = browserBundle.GetStringFromName("social.error.tryAgain.label");

--- a/browser/base/content/browser-social.js
+++ b/browser/base/content/browser-social.js
@@ -599,20 +599,25 @@ SocialShare = {
     }
   },
 
   setErrorMessage: function() {
     let iframe = this.iframe;
     if (!iframe)
       return;
 
-    iframe.removeAttribute("src");
-    iframe.webNavigation.loadURI("about:socialerror?mode=compactInfo&origin=" +
-                                 encodeURIComponent(iframe.getAttribute("origin")),
-                                 null, null, null, null);
+    let url;
+    let origin = iframe.getAttribute("origin");
+    if (!origin) {
+      // directory site is down
+      url = "about:socialerror?mode=tryAgainOnly&directory=1&url=" + encodeURIComponent(iframe.getAttribute("src"));
+    } else {
+      url = "about:socialerror?mode=compactInfo&origin=" + encodeURIComponent(origin);
+    }
+    iframe.webNavigation.loadURI(url, null, null, null, null);
     sizeSocialPanelToContent(this.panel, iframe);
   },
 
   sharePage: function(providerOrigin, graphData, target) {
     // if providerOrigin is undefined, we use the last-used provider, or the
     // current/default provider.  The provider selection in the share panel
     // will call sharePage with an origin for us to switch to.
     this._createFrame();

--- a/browser/modules/Social.jsm
+++ b/browser/modules/Social.jsm
@@ -7,18 +7,19 @@
 this.EXPORTED_SYMBOLS = ["Social", "CreateSocialStatusWidget",
                          "CreateSocialMarkWidget", "OpenGraphBuilder",
                          "DynamicResizeWatcher", "sizeSocialPanelToContent"];
 
 const Ci = Components.interfaces;
 const Cc = Components.classes;
 const Cu = Components.utils;
 
-// The minimum sizes for the auto-resize panel code.
-const PANEL_MIN_HEIGHT = 100;
+// The minimum sizes for the auto-resize panel code, minimum size necessary to
+// properly show the error page in the panel.
+const PANEL_MIN_HEIGHT = 200;
 const PANEL_MIN_WIDTH = 330;
 
 Cu.import("resource://gre/modules/Services.jsm");
 Cu.import("resource://gre/modules/XPCOMUtils.jsm");
 
 XPCOMUtils.defineLazyModuleGetter(this, "CustomizableUI",
   "resource:///modules/CustomizableUI.jsm");
 XPCOMUtils.defineLazyModuleGetter(this, "SocialService",
@@ -345,40 +346,48 @@ SocialErrorListener.prototype = {
   },
 
   onStateChange: function SPL_onStateChange(aWebProgress, aRequest, aState, aStatus) {
     let failure = false;
     if ((aState & Ci.nsIWebProgressListener.STATE_STOP)) {
       if (aRequest instanceof Ci.nsIHttpChannel) {
         try {
           // Change the frame to an error page on 4xx (client errors)
-          // and 5xx (server errors)
+          // and 5xx (server errors).  responseStatus throws if it is not set.
           failure = aRequest.responseStatus >= 400 &&
                     aRequest.responseStatus < 600;
-        } catch (e) {}
+        } catch (e) {
+          failure = aStatus == Components.results.NS_ERROR_CONNECTION_REFUSED;
+        }
       }
     }
 
     // Calling cancel() will raise some OnStateChange notifications by itself,
     // so avoid doing that more than once
     if (failure && aStatus != Components.results.NS_BINDING_ABORTED) {
       aRequest.cancel(Components.results.NS_BINDING_ABORTED);
-      let provider = Social._getProviderFromOrigin(this.iframe.getAttribute("origin"));
-      provider.errorState = "content-error";
+      let origin = this.iframe.getAttribute("origin");
+      if (origin) {
+        let provider = Social._getProviderFromOrigin(origin);
+        provider.errorState = "content-error";
+      }
       this.setErrorMessage(aWebProgress.QueryInterface(Ci.nsIDocShell)
                               .chromeEventHandler);
     }
   },
 
   onLocationChange: function SPL_onLocationChange(aWebProgress, aRequest, aLocation, aFlags) {
     if (aFlags & Ci.nsIWebProgressListener.LOCATION_CHANGE_ERROR_PAGE) {
       aRequest.cancel(Components.results.NS_BINDING_ABORTED);
-      let provider = Social._getProviderFromOrigin(this.iframe.getAttribute("origin"));
-      if (!provider.errorState)
-        provider.errorState = "content-error";
+      let origin = this.iframe.getAttribute("origin");
+      if (origin) {
+        let provider = Social._getProviderFromOrigin(origin);
+        if (!provider.errorState)
+          provider.errorState = "content-error";
+      }
       schedule(function() {
         this.setErrorMessage(aWebProgress.QueryInterface(Ci.nsIDocShell)
                               .chromeEventHandler);
       }.bind(this));
     }
   },
 
   onProgressChange: function SPL_onProgressChange() {},