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    <title>Bug 1300461</title>

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          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");

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

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

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

          if (opener.testCount == 1) {

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

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