1 files changed, 29 insertions, 0 deletions
diff --git a/browser/base/content/test/favicons/browser_invalid_href_fallback.js b/browser/base/content/test/favicons/browser_invalid_href_fallback.js
new file mode 100644
index 0000000000..d2a36b970d
--- /dev/null
+++ b/browser/base/content/test/favicons/browser_invalid_href_fallback.js
@@ -0,0 +1,29 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+add_task(async () => {
+  const testPath =
+    // eslint-disable-next-line @microsoft/sdl/no-insecure-url
+    "http://example.com/browser/browser/base/content/test/favicons/";
+  // eslint-disable-next-line @microsoft/sdl/no-insecure-url
+  const expectedIcon = "http://example.com/favicon.ico";
+
+  await BrowserTestUtils.withNewTab(
+    { gBrowser, url: "about:blank" },
+    async browser => {
+      let faviconPromise = waitForLinkAvailable(browser);
+      BrowserTestUtils.loadURIString(
+        browser,
+        testPath + "file_invalid_href.html"
+      );
+      await BrowserTestUtils.browserLoaded(browser);
+
+      let iconURI = await faviconPromise;
+      Assert.equal(
+        iconURI,
+        expectedIcon,
+        "Should have fallen back to the default site favicon for an invalid href attribute"
+      );
+    }
+  );
+});