instagram_autofollow.js

(function(e,s,n) {
    e.src = s;
    e.onload = function() {
        console.log('jQuery injected');
        n(jQuery.noConflict());
    };
    document.head.appendChild(e);
})(document.createElement('script'), '//code.jquery.com/jquery-latest.min.js', function($){
    (function follow() {
        // change the inner HTML to your language
        var btns = $('button').filter(function (i, item) { return item.innerHTML == "S’abonner" });

        if (btns.length == 0) {
            // scroll to load more...
            window.scrollTo(0,document.body.scrollHeight);
            console.log("moar!");
        } else {
            // click one at random *sneaky* *sneaky* 
            $(btns[Math.floor(Math.random()*btns.length)]).click();
            console.log("click.");
        }

        // resume in 15~20s
        setTimeout(follow, 15000 + Math.floor(Math.random()*5000));
    })();
});