private void bSelectPathToFfExe_Click(object sender, EventArgs e)
{
var folderBD = new FolderBrowserDialog();
if (folderBD.ShowDialog() == DialogResult.OK)
{
tbPathToFfExe.Text = (System.IO.Path.GetFullPath(folderBD.SelectedPath).Substring(System.IO.Path.GetFullPath(folderBD.SelectedPath).Length - 1) != @"\" ? tbPathToFfExe.Text = System.IO.Path.GetFullPath(folderBD.SelectedPath) + @"\firefox.exe" : tbPathToFfExe.Text = System.IO.Path.GetFullPath(folderBD.SelectedPath));
}
}