I would like pagespeed to remain on but would like to disallow people from adding pagespeed query parameters to get different results of the site. Or, only allow it for a specific IP address (i.e., my own)

Is this possible through pagespeed or should I use my nginx's configuration to match .PageSpeed. ?

For now I'm using this workaround:

 if ($args ~ (.*)PageSpeed[^=]*=[^&]*(.*)) {
 set $args 1ドル2ドル;
 }