public static function updateBrowserArchives($table)
    {
        // rename old UserSettings archives where no DeviceDetection archives exists
        Db::exec(sprintf("UPDATE IGNORE %s SET name='DevicesDetection_browserVersions' WHERE name = 'UserSettings_browser'", $table));

        /*
         * check dates of remaining (non-day) archives with calculated safe date
         * archives before or within that week/month/year of that date will be replaced
         */
        $oldBrowserBlobs = Db::get()->fetchAll(sprintf("SELECT * FROM %s WHERE name = 'UserSettings_browser' AND `period` > 1", $table));
        foreach ($oldBrowserBlobs as $blob) {

            // if start date of blob is before calculated date us old usersettings archive instead of already existing DevicesDetection archive
            if (strtotime($blob['date1']) < self::getFirstDayOfArchivedDeviceDetectorData()) {
                Db::get()->query(sprintf("DELETE FROM %s WHERE idarchive = ? AND name = ?", $table), array($blob['idarchive'], 'DevicesDetection_browserVersions'));
                Db::get()->query(sprintf("UPDATE %s SET name = ? WHERE idarchive = ? AND name = ?", $table), array('DevicesDetection_browserVersions', $blob['idarchive'], 'UserSettings_browser'));
            }
        }
    }