rebase + context

index.bs

@@ -4373,21 +4373,28 @@ navigated</dfn> steps given |navigable| and |navigation status|:
    <dd>
       <pre class="cddl local-cddl">
         browsingContext.HistoryUpdated = (
-         method: "browsingContext.historyUpdated",
-         params: {
-            url: text,
-         }
+          method: "browsingContext.historyUpdated",
+          params: browsingContext.HistoryUpdatedParameters
         )
+
+        browsingContext.HistoryUpdatedParameters = {
+          context: browsingContext.BrowsingContext,
+          url: text
+        }
       </pre>
    </dd>
 </dl>
 
 <div algorithm>
 The [=remote end event trigger=] is the <dfn export>WebDriver BiDi history updated</dfn> steps given |navigable|:
 
+1. Let |params| be a [=/map=] matching the <code>browsingContext.HistoryUpdatedParameters</code> production, 
+   with the <code>url</code> field set to |navigable|'s [=active browsing context=]'s [=active document=]'s <a spec=DOM>URL</a> and
+   the <code>context<code> field set to |navigable|'s [=navigable id=].
+
 1. Let |body| be a [=/map=] matching the
-    <code>browsingContext.HistoryUpdated</code> production, with the
-    <code>url</code> field set to |navigable|'s [=active browsing context=]'s [=active document=]'s <a spec=DOM>URL</a>.
+   <code>browsingContext.HistoryUpdated</code> production, with the
+   <code>params</code> field set to |params|.
 
 1. Let |related browsing contexts| be a [=/set=] containing |navigable|'s [=active browsing context=].