1 files changed, 57 insertions, 0 deletions
diff --git a/toolkit/components/webextensions/ext-c-extension.js b/toolkit/components/webextensions/ext-c-extension.js
new file mode 100644
index 000000000..669309bea
--- /dev/null
+++ b/toolkit/components/webextensions/ext-c-extension.js
@@ -0,0 +1,57 @@
+"use strict";
+
+XPCOMUtils.defineLazyModuleGetter(this, "PrivateBrowsingUtils",
+                                  "resource://gre/modules/PrivateBrowsingUtils.jsm");
+
+function extensionApiFactory(context) {
+  return {
+    extension: {
+      getURL(url) {
+        return context.extension.baseURI.resolve(url);
+      },
+
+      get lastError() {
+        return context.lastError;
+      },
+
+      get inIncognitoContext() {
+        return context.incognito;
+      },
+    },
+  };
+}
+
+extensions.registerSchemaAPI("extension", "addon_child", extensionApiFactory);
+extensions.registerSchemaAPI("extension", "content_child", extensionApiFactory);
+extensions.registerSchemaAPI("extension", "addon_child", context => {
+  return {
+    extension: {
+      getViews: function(fetchProperties) {
+        let result = Cu.cloneInto([], context.cloneScope);
+
+        for (let view of context.extension.views) {
+          if (!view.active) {
+            continue;
+          }
+          if (!context.principal.subsumes(view.principal)) {
+            continue;
+          }
+
+          if (fetchProperties !== null) {
+            if (fetchProperties.type !== null && view.viewType != fetchProperties.type) {
+              continue;
+            }
+
+            if (fetchProperties.windowId !== null && view.windowId != fetchProperties.windowId) {
+              continue;
+            }
+          }
+
+          result.push(view.contentWindow);
+        }
+
+        return result;
+      },
+    },
+  };
+});