$mech->get('https://www.mscha.org/knmi/summer.cgi?month=-1');
$mech->follow_link(text=>'2020');    # opens a new window

my $chrome = $mech->driver;
my @tabs = $chrome->getTargets()->get;
my ($new_tab) = grep { $_->{url} =~ m{graph} } @tabs;
$chrome->connect(tab=>$new_tab)->get;

my $png = $mech->content_as_png;