From e71a959ec0da7af795ea5359807c37baf3725de3 Mon Sep 17 00:00:00 2001
From: Anna Sato <annasato@google.com>
Date: Wed, 8 Oct 2025 15:26:01 +0900
Subject: [PATCH 1/2] feat(navigation): Ignore duplicate navigations

---
 source | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

diff --git a/source b/source
index 5361f494458..18a33ff93e8 100644
--- a/source
+++ b/source
@@ -106290,6 +106290,42 @@ location.href = '#foo';</code></pre>
     data-x="apply the traverse history step">traversing</span> are ignored.</p>
    </li>
 
+   <li>
+    <p>If <var>navigable</var>'s <span>ongoing navigation</span> is not null, and all of the following
+    are true:</p>
+
+    <ul>
+     <li>
+      <p>the time elapsed since the ongoing navigation was initiated is within a
+      user-agent-defined threshold;</p>
+     </li>
+     <li>
+      <p>both the new and ongoing navigations are HTTP GET requests, and the new navigation is not
+      a form submission;</p>
+     </li>
+     <li>
+      <p>the navigations have an identical <var>url</var>, <span
+      data-x="document-state-initiator-origin">initiator origin</span>, <span
+      data-x="document-state-request-referrer">referrer</span>, <span
+      data-x="document-state-request-referrer-policy">request referrer policy</span>,
+      <var>userInvolvement</var>, <var>historyHandling</var>, and request headers,</p>
+     </li>
+    </ul>
+    <p>then:</p>
+
+    <ol>
+     <li>
+      <p>Invoke <span>WebDriver BiDi navigation failed</span> with <var>navigable</var> and a new
+      <span>WebDriver BiDi navigation status</span> whose <span
+      data-x="navigation-status-id">id</span> is <var>navigationId</var>, <span
+      data-x="navigation-status-status">status</span> is "<code
+      data-x="navigation-status-canceled">canceled</code>", and <span
+      data-x="navigation-status-url">url</span> is <var>url</var>.</p>
+     </li>
+     <li><p>Return.</p></li>
+    </ol>
+   </li>
+
    <li>
     <p><span>Set the ongoing navigation</span> for <var>navigable</var> to
     <var>navigationId</var>.</p>

From 27be0e6686bc906afd9cf96c7105c4b2cff6b9d0 Mon Sep 17 00:00:00 2001
From: Anna Sato <annasato@google.com>
Date: Fri, 17 Oct 2025 01:43:15 +0000
Subject: [PATCH 2/2] Refine duplicate navigation check

---
 source | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/source b/source
index 18a33ff93e8..86554e0375e 100644
--- a/source
+++ b/source
@@ -106308,7 +106308,10 @@ location.href = '#foo';</code></pre>
       data-x="document-state-initiator-origin">initiator origin</span>, <span
       data-x="document-state-request-referrer">referrer</span>, <span
       data-x="document-state-request-referrer-policy">request referrer policy</span>,
-      <var>userInvolvement</var>, <var>historyHandling</var>, and request headers,</p>
+      <var>userInvolvement</var>, and <var>historyHandling</var>;</p>
+     </li>
+     <li>
+      <p>the ongoing navigation's <span>active document</span>'s "navigation conditions potentially changed" flag is false,</p>
      </li>
     </ul>
     <p>then:</p>