This bookmarklet opens up FB comments via http://www.alecjacobson.com/weblog/?p=4074 and http://mikakesensei.com/perso/javascript/fb_expander.js - Just make a new bookmark and cut/paste this into the URL field.

facebook comment expander bookmarklet

javascript: var cur_arr = [];

function what_to_click() {
    if (cur_arr.length) {
        return cur_arr.pop();
    } else {
        cur_arr = [].slice.call(document.getElementsByClassName("UFIPagerLink"));
        if (cur_arr.length) {
            return cur_arr.pop();
        } else {
            cur_arr = [].slice.call(document.getElementsByClassName("UFIReplySocialSentenceLinkText UFIReplySocialSentenceVerified")).filter(function(k) {
                return !~k.textContent.indexOf("Masquer");
            });
        }
        if (cur_arr.length) {
            return cur_arr.pop();
        } else {
            cur_arr = [].slice.call(document.getElementsByClassName("fss")).filter(function(k) {
                return !~k.textContent.indexOf("Masquer");
            });
        }
        if (cur_arr.length) {
            return cur_arr.pop();
        } else {
            cur_arr = [].slice.call(document.getElementsByClassName("see_more_link")).filter(function(k) {
                return !~k.textContent.indexOf("Masquer");
            });
        }
        if (cur_arr.length) {
            return cur_arr.pop();
        } 
        
    }
}

function auto_callback() {
    var i = what_to_click();
    if (!i) {
        console.log("--------  done  --------");
        alert("Done!");
        return;
    } else {
        console.log("click '" + i.textContent + "'");
        i.click();
        window.setTimeout(function() {
            auto_callback();
        }, 10);
    }
}
auto_callback();

woodwardtw, thank you!
Your code works pretty well!
Can you please include expanding this type of things "*** replied · *** Replies"?

Thank you in advance!