diff --git a/toolkit/mozapps/extensions/XPIProvider.jsm b/toolkit/mozapps/extensions/XPIProvider.jsm
index 90e327acf20..4ebf8f6758d 100644
--- a/toolkit/mozapps/extensions/XPIProvider.jsm
+++ b/toolkit/mozapps/extensions/XPIProvider.jsm
@@ -5322,8 +5322,6 @@ AddonInstall.prototype = {
       this.badCertHandler.asyncOnChannelRedirect(aOldChannel, aNewChannel, aFlags, aCallback);
     else
       aCallback.onRedirectVerifyCallback(Cr.NS_OK);
-
-    this.channel = aNewChannel;
   },
 
   /**
diff --git a/toolkit/mozapps/extensions/amWebInstallListener.js b/toolkit/mozapps/extensions/amWebInstallListener.js
index 890847126e1..dfa8250f8e5 100644
--- a/toolkit/mozapps/extensions/amWebInstallListener.js
+++ b/toolkit/mozapps/extensions/amWebInstallListener.js
@@ -157,11 +157,8 @@ Installer.prototype = {
           }, this);
         }
         break;
-      case AddonManager.STATE_CANCELLED:
-        // Just ignore cancelled downloads
-        break;
       default:
-        WARN("Download of " + install.sourceURI.spec + " in unexpected state " +
+        WARN("Download of " + install.sourceURI + " in unexpected state " +
              install.state);
       }
     }
diff --git a/toolkit/mozapps/extensions/test/xpcshell/test_install.js b/toolkit/mozapps/extensions/test/xpcshell/test_install.js
index b89d0ca6f37..f2ab70ad35e 100644
--- a/toolkit/mozapps/extensions/test/xpcshell/test_install.js
+++ b/toolkit/mozapps/extensions/test/xpcshell/test_install.js
@@ -39,11 +39,6 @@ function run_test() {
   testserver = new nsHttpServer();
   testserver.registerDirectory("/addons/", do_get_file("addons"));
   testserver.registerDirectory("/data/", do_get_file("data"));
-  testserver.registerPathHandler("/redirect", function(aRequest, aResponse) {
-    aResponse.setStatusLine(null, 301, "Moved Permanently");
-    let url = aRequest.host + ":" + aRequest.port + aRequest.queryString;
-    aResponse.setHeader("Location", "http://" + url);
-  });
   testserver.start(4444);
 
   do_test_pending();
@@ -1471,46 +1466,6 @@ function run_test_25() {
 
     ensure_test_completed();
 
-    run_test_26();
+    end_test();
   }, "application/x-xpinstall", do_get_addon_hash("test_install3"));
 }
-
-function run_test_26() {
-  prepare_test({ }, [
-    "onNewInstall",
-    "onDownloadStarted",
-    "onDownloadCancelled"
-  ]);
-
-  let observerService = AM_Cc["@mozilla.org/network/http-activity-distributor;1"].
-                        getService(AM_Ci.nsIHttpActivityDistributor);
-  observerService.addObserver({
-    observeActivity: function(aChannel, aType, aSubtype, aTimestamp, aSizeData,
-                              aStringData) {
-      aChannel.QueryInterface(AM_Ci.nsIChannel);
-      // Wait for the final event for the redirected URL
-      if (aChannel.URI.spec != "http://localhost:4444/addons/test_install1.xpi" ||
-          aType != AM_Ci.nsIHttpActivityObserver.ACTIVITY_TYPE_HTTP_TRANSACTION ||
-          aSubtype != AM_Ci.nsIHttpActivityObserver.ACTIVITY_SUBTYPE_TRANSACTION_CLOSE)
-        return;
-
-      // Request should have been cancelled
-      do_check_eq(aChannel.status, Components.results.NS_BINDING_ABORTED);
-
-      observerService.removeObserver(this);
-
-      do_test_finished();
-    }
-  });
-
-  let url = "http://localhost:4444/redirect?/addons/test_install1.xpi";
-  AddonManager.getInstallForURL(url, function(aInstall) {
-    aInstall.addListener({
-      onDownloadProgress: function(aInstall) {
-        aInstall.cancel();
-      }
-    });
-
-    aInstall.install();
-  }, "application/x-xpinstall");
-}