1 files changed, 67 insertions, 0 deletions
diff --git a/docshell/test/browser/browser_backforward_userinteraction_about.js b/docshell/test/browser/browser_backforward_userinteraction_about.js
new file mode 100644
index 0000000000..606fcc45c5
--- /dev/null
+++ b/docshell/test/browser/browser_backforward_userinteraction_about.js
@@ -0,0 +1,67 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+const TEST_PAGE =
+  getRootDirectory(gTestPath).replace(
+    "chrome://mochitests/content",
+    "https://example.com"
+  ) + "dummy_page.html";
+
+// Regression test for navigating back after visiting an about: page
+// loaded in the parent process.
+add_task(async function test_about_back() {
+  // Test with both pref on and off
+  for (let requireUserInteraction of [true, false]) {
+    Services.prefs.setBoolPref(
+      "browser.navigation.requireUserInteraction",
+      requireUserInteraction
+    );
+
+    let tab = await BrowserTestUtils.openNewForegroundTab(
+      gBrowser,
+      TEST_PAGE + "?entry=0"
+    );
+    let browser = tab.linkedBrowser;
+    assertBackForwardState(false, false);
+
+    await followLink(TEST_PAGE + "?entry=1");
+    assertBackForwardState(true, false);
+
+    await followLink(TEST_PAGE + "?entry=2");
+    assertBackForwardState(true, false);
+
+    // Add some user interaction to entry 2
+    await BrowserTestUtils.synthesizeMouse("body", 0, 0, {}, browser, true);
+
+    await loadURI("about:config");
+    assertBackForwardState(true, false);
+
+    await goBack(TEST_PAGE + "?entry=2");
+    assertBackForwardState(true, true);
+
+    if (!requireUserInteraction) {
+      await goBack(TEST_PAGE + "?entry=1");
+      assertBackForwardState(true, true);
+    }
+
+    await goBack(TEST_PAGE + "?entry=0");
+    assertBackForwardState(false, true);
+
+    if (!requireUserInteraction) {
+      await goForward(TEST_PAGE + "?entry=1");
+      assertBackForwardState(true, true);
+    }
+
+    await goForward(TEST_PAGE + "?entry=2");
+    assertBackForwardState(true, true);
+
+    await goForward("about:config");
+    assertBackForwardState(true, false);
+
+    BrowserTestUtils.removeTab(tab);
+  }
+
+  Services.prefs.clearUserPref("browser.navigation.requireUserInteraction");
+});