1 files changed, 18 insertions, 0 deletions
diff --git a/toolkit/content/tests/browser/browser_charsetMenu_disable_on_ascii.js b/toolkit/content/tests/browser/browser_charsetMenu_disable_on_ascii.js
new file mode 100644
index 0000000000..2982a63141
--- /dev/null
+++ b/toolkit/content/tests/browser/browser_charsetMenu_disable_on_ascii.js
@@ -0,0 +1,18 @@
+/* Test that the charset menu is properly enabled when swapping browsers. */
+add_task(async function test() {
+  function charsetMenuEnabled() {
+    return !document
+      .getElementById("repair-text-encoding")
+      .hasAttribute("disabled");
+  }
+
+  const PAGE = "data:text/html,<!DOCTYPE html><body>ASCII-only";
+  let tab = await BrowserTestUtils.openNewForegroundTab({
+    gBrowser,
+    url: PAGE,
+    waitForStateStop: true,
+  });
+  ok(!charsetMenuEnabled(), "should have a charset menu here");
+
+  BrowserTestUtils.removeTab(tab);
+});