instagram-auto-follow-activity.js

var buttons = $('div[role=dialog]').find('button:contains(Follow)').filter(function() { 
    return $(this).text().toLowerCase() === 'follow';
});

$.each(buttons, function(idx, itm) { 
    var secondes = Math.floor((Math.random() * 10) + 3);
    
    setTimeout(function() {
        $(itm).trigger('click');
    }, duration = secondes * 1000);
});