file_bug1300461_back.html

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    <title>Bug 1300461</title>

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  <body onload="test();" onunload="">

    <script>

      let Ci = SpecialPowers.Ci;

      let webNav = SpecialPowers.wrap(window)

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      let shistory = webNav.sessionHistory;

      async function test() {

        if (opener) {

          opener.info("file_bug1300461_back.html");

          opener.is(shistory.count, 2, "check history length");

          opener.is(shistory.index, 1, "check history index");

          if (!SpecialPowers.Services.appinfo.sessionHistoryInParent) {

            opener.is(shistory.legacySHistory.requestedIndex, -1, "check requestedIndex");

          } else {

            let index = await opener.getSHRequestedIndex(SpecialPowers.wrap(window).browsingContext.id);

            opener.is(index, -1, "check requestedIndex");

          opener.ok(webNav.canGoBackIgnoringUserInteraction, "check canGoBackIgnoringUserInteraction");

          if (opener.testCount == 1) {

            opener.info("replaceState to redirect.html");

            window.history.replaceState({}, "", "file_bug1300461_redirect.html");

          window.history.back();

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