rem: gPrefService.setCharPref("browser.history.grouping", groupingType); 
context: function GroupBy(groupingType){    gHistoryGrouping = groupingType;    switch(groupingType) {    case "none":        gHistoryTree.setAttribute("ref", "NC:HistoryRoot");        break;    case "site":        // xxx for now        gHistoryTree.setAttribute("ref", "NC:HistoryByDate");        break;    case "day":    default:        gHistoryTree.setAttribute("ref", "NC:HistoryByDate");        break;    }    gPrefService.setCharPref("browser.history.grouping", groupingType);}
meta: 8395	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/8395/8275f2bc1d1858dff8c99eab5a5238c6f39d6d79/history.js/buggy/browser/components/history/content/history.js