1 files changed, 43 insertions, 0 deletions
diff --git a/toolkit/components/extensions/child/ext-webRequest.js b/toolkit/components/extensions/child/ext-webRequest.js
new file mode 100644
index 0000000000..881da28a17
--- /dev/null
+++ b/toolkit/components/extensions/child/ext-webRequest.js
@@ -0,0 +1,43 @@
+/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim: set sts=2 sw=2 et tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+this.webRequest = class extends ExtensionAPI {
+  getAPI(context) {
+    let filters = new WeakSet();
+
+    context.callOnClose({
+      close() {
+        for (let filter of ChromeUtils.nondeterministicGetWeakSetKeys(
+          filters
+        )) {
+          try {
+            filter.disconnect();
+          } catch (e) {
+            // Ignore.
+          }
+        }
+      },
+    });
+
+    return {
+      webRequest: {
+        filterResponseData(requestId) {
+          requestId = parseInt(requestId, 10);
+
+          let streamFilter = context.cloneScope.StreamFilter.create(
+            requestId,
+            context.extension.id
+          );
+
+          filters.add(streamFilter);
+          return streamFilter;
+        },
+      },
+    };
+  }
+};