Bug 1790378 - [webdriver-bidi] Added timestamp to navigation info. r=webdriver-reviewers,jdescottes

Differential Revision: https://phabricator.services.mozilla.com/D166381

remote/webdriver-bidi/modules/windowglobal/browsingContext.sys.mjs

@@ -37,6 +37,7 @@ class BrowsingContextModule extends Module {
       // TODO: The navigation id should be a real id mapped to the navigation.
       // See https://bugzilla.mozilla.org/show_bug.cgi?id=1763122
       navigation: null,
+      timestamp: Date.now(),
       url: data.target.baseURI,
     };
   }