sub new {
    my $class = shift;

    my %default_parms = (
        agent       => "WWW-Mechanize/$VERSION",
        cookie_jar  => {},
    );

    my $self = $class->SUPER::new( %default_parms, @_ );

    $self->{page_stack} = [];
    $self->{quiet} = 0;
    $self->env_proxy();
    push( @{$self->requests_redirectable}, 'POST' );

    return bless $self, $class;
}