=item *
C<js_JSON> - whether to use native JSON encoder of Firefox
js_JSON => 'native', # force using the native JSON encoder
The default is to autodetect whether a native JSON encoder is ava
if (! ref $args{ app }) {
my @passthrough = qw(launch repl bufsize log use_queue js_JSON);
my %options = map { exists $args{ $_ } ? ($_ => delete $args{ $_ }) : () }
$encoding)";
# Switch on UTF-8 flag
# This should never happen, as JSON::XS (and JSON) should always
# already return proper UTF-8
# But it does happen.