1 files changed, 63 insertions, 0 deletions
diff --git a/browser/components/extensions/test/browser/browser_ext_contentscript_cross_docGroup_adoption.js b/browser/components/extensions/test/browser/browser_ext_contentscript_cross_docGroup_adoption.js
new file mode 100644
index 0000000000..a0d367ec93
--- /dev/null
+++ b/browser/components/extensions/test/browser/browser_ext_contentscript_cross_docGroup_adoption.js
@@ -0,0 +1,63 @@
+/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim: set sts=2 sw=2 et tw=80: */
+"use strict";
+
+add_task(async function test_cross_docGroup_adoption() {
+  await SpecialPowers.pushPrefEnv({
+    set: [["extensions.content_web_accessible.enabled", true]],
+  });
+
+  let tab = await BrowserTestUtils.openNewForegroundTab(
+    gBrowser,
+    "http://example.com/"
+  );
+
+  let extension = ExtensionTestUtils.loadExtension({
+    manifest: {
+      content_scripts: [
+        {
+          matches: ["http://example.com/"],
+          js: ["content-script.js"],
+        },
+      ],
+      web_accessible_resources: ["current.html"],
+    },
+
+    files: {
+      "current.html": "<html>data</html>",
+      "content-script.js": function () {
+        let iframe = document.createElement("iframe");
+        iframe.src = browser.runtime.getURL("current.html");
+        document.body.appendChild(iframe);
+
+        iframe.addEventListener(
+          "load",
+          () => {
+            let parser = new DOMParser();
+            let bold = parser.parseFromString(
+              "<b>NodeAdopted</b>",
+              "text/html"
+            );
+            let doc = iframe.contentDocument;
+
+            let node = document.adoptNode(bold.documentElement);
+            doc.replaceChild(node, doc.documentElement);
+
+            const expected =
+              "<html><head></head><body><b>NodeAdopted</b></body></html>";
+            browser.test.assertEq(expected, doc.documentElement.outerHTML);
+
+            browser.test.notifyPass("nodeAdopted");
+          },
+          { once: true }
+        );
+      },
+    },
+  });
+
+  await extension.startup();
+  await extension.awaitFinish("nodeAdopted");
+  await extension.unload();
+
+  BrowserTestUtils.removeTab(tab);
+});