var terms = 'Firefox Thunderbird Opera Safari';

var HistoryService = PlacesUtils.history;
var BookmarksService = PlacesUtils.bookmarks;

var query = HistoryService.getNewQuery();
query.beginTimeReference =
  query.endTimeReference = query.TIME_RELATIVE_NOW;
query.beginTime = -(1000000 * 60 * 60 * 24);

var queries = terms.split(' ')
                   .map(function(aTerm) {
                     query.searchTerms = aTerm;
                     return query.clone();
                   });

var options = HistoryService.getNewQueryOptions();
options.sortingMode = options.SORT_BY_TITLE_ASCENDING;
options.expandQueries = true;

var result = HistoryService.executeQueries(
               queries, queries.length, options);

// テンポラリフォルダに問い合わせ結果を出力する
var tmpId = BookmarksService.createFolder(
              PlacesUtils.unfiledBookmarksFolderId,
              '\u62bd\u51fa\u7d50\u679c', -1);
var batch = {
  runBatched : function()
  {
    result.root.containerOpen = true;
    for (var i = 0, maxi = result.root.childCount; i < maxi; i++)
    {
      var node = result.root.getChild(i);
      BookmarksService.insertBookmark(tmpId, makeURI(node.uri), -1, node.title);
    }
  }
};
BookmarksService.runInBatchMode(batch, null);

var writer = {
  value : '',
  write : function(aData, aLen) {
    this.value += aData;
  }
};
var result = PlacesUtils.getFolderContents(tmpId, false, false);
PlacesUtils.serializeNodeAsJSONToOutputStream(
  result.root, writer, true, true, []);

BookmarksService.removeFolder(tmpId);

var jsonString = writer.value;