1 files changed, 35 insertions, 0 deletions
diff --git a/browser/extensions/webcompat/about-compat/AboutCompat.sys.mjs b/browser/extensions/webcompat/about-compat/AboutCompat.sys.mjs
new file mode 100644
index 0000000000..bedcdd668d
--- /dev/null
+++ b/browser/extensions/webcompat/about-compat/AboutCompat.sys.mjs
@@ -0,0 +1,35 @@
+/* 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/. */
+
+const addonID = "webcompat@mozilla.org";
+const addonPageRelativeURL = "/about-compat/aboutCompat.html";
+
+export function AboutCompat() {
+  this.chromeURL =
+    WebExtensionPolicy.getByID(addonID).getURL(addonPageRelativeURL);
+}
+
+AboutCompat.prototype = {
+  QueryInterface: ChromeUtils.generateQI(["nsIAboutModule"]),
+  getURIFlags() {
+    return (
+      Ci.nsIAboutModule.URI_MUST_LOAD_IN_EXTENSION_PROCESS |
+      Ci.nsIAboutModule.IS_SECURE_CHROME_UI
+    );
+  },
+
+  newChannel(aURI, aLoadInfo) {
+    const uri = Services.io.newURI(this.chromeURL);
+    const channel = Services.io.newChannelFromURIWithLoadInfo(uri, aLoadInfo);
+    channel.originalURI = aURI;
+
+    channel.owner = (
+      Services.scriptSecurityManager.createContentPrincipal ||
+      // Handles fallback to earlier versions.
+      // eslint-disable-next-line mozilla/valid-services-property
+      Services.scriptSecurityManager.createCodebasePrincipal
+    )(uri, aLoadInfo.originAttributes);
+    return channel;
+  },
+};