all-in-one script ( with parameters ) >> big thnx to @subimage && xtra updates by Luigi DiGangi

leave_facebook.js

// forked from subimage's modifications of my much messier prior scripts 
// ( https://gist.github.com/subimage/d952e49c9184d6a7a74f )

// after entering jquery into ur console, enter the code below in ur console
// then load a few months of activity && enter leaveFacebook(); into ur console
// u can specify parameters like so: leaveFacebook('Unlike'); if u only want to unlike
// or leaveFacebook('Unfriend'); if u only want to unfriend
// etc...

// visit nickbriz.com/facebook for vidz && details

var waitSeconds = 1; // adjust for slow internet connections
var menuChoices = null;
var currTimeout = null;

// Loads menus we're interested in clicking at a later time...
function loadMenus(params) {
  console.log("Loading menus to click!");
  var editMenus = $('.uiPopover > a');
  for (var i = 0; i < editMenus.length; i++) { editMenus[i].click(); };

  if(params){
    var menuStringsToMatch = [];
    if(params.indexOf('Report/Mark as Spam') != -1){ menuStringsToMatch.push('Report/Mark as Spam'); } 
    if(params.indexOf('Report/Remove Tag') != -1){ menuStringsToMatch.push('Report/Remove Tag'); }
    if(params.indexOf('Delete...') != -1){ menuStringsToMatch.push('Delete...'); }
    if(params.indexOf('Remove Tag...') != -1){ menuStringsToMatch.push('Remove Tag...'); }
    if(params.indexOf('Remove Post') != -1){ menuStringsToMatch.push('Remove Post'); }
    if(params.indexOf('Delete This Photo') != -1){ menuStringsToMatch.push('Delete This Photo'); }
    if(params.indexOf('Delete') != -1){ menuStringsToMatch.push('Delete'); }
    if(params.indexOf('Unlike') != -1){ menuStringsToMatch.push('Unlike'); }
    if(params.indexOf('Unfriend') != -1){ menuStringsToMatch.push('Unfriend'); }
  } else {
      var menuStringsToMatch = [ 'Report/Remove Tag','Remove Tag...','Report/Mark as Spam','Remove Post','Delete This Photo','Delete','Delete...','Unlike','Unfriend' ];
  }

  menuChoices = [];
  $('.uiLayer span').each(function() {
    var ele = $(this);
    var menuContent = ele.html();

    for(var i=0;i<menuStringsToMatch.length;i++) {
      var matchStr = menuStringsToMatch[i];
      if(menuContent.indexOf(matchStr) == 0) menuChoices.push(ele);
    }
  });
  console.log("Found "+menuChoices.length+" menus to click...please hold!");
}

// Clicks confirmation buttons
function clickButtons() {
  console.log("Clearing confirmation buttons");
  var buttonLabelsToClick = [
    'Continue', 'Confirm', 'Delete', 'Remove','Remove Post','Okay', 'Close'
  ];
  $('button, a').each(function( i ) {
      var ele = $(this);
      var btnContent = ele.html();
      for(var i=0;i<buttonLabelsToClick.length;i++) {
        var matchStr = buttonLabelsToClick[i];
        if(btnContent.indexOf(matchStr) == 0) ele.click();
      }
  });
  // Get rid of any "this content is no longer available" warnings
  window.setTimeout(function(){
    $('a.layerCancel span').click();
  }, 100);
  $( "input[value|='Delete']" ).click();
}

// Clicks menus, one by one...waits for it to load (hopefully), 
// then clicks the delete / continue / whatever buttons
function clickNextMenu() {
  var currentEle = menuChoices.shift();
  console.log(currentEle);
  $(currentEle).click();
  // Clear timeouts so they don't stack up on each other
  window.clearTimeout(currTimeout);
  currTimeout = window.setTimeout(function() {
    clickButtons();
    if(menuChoices.length > 0) clickNextMenu();
  }, waitSeconds*1000);
}


function leaveFacebook(params) {
  loadMenus(params);
  clickNextMenu();
}

I also get the same problem as fl4tfour, It seems that the only active continue bottom is on the bottom of the stack so you can't get to it. Would be nice is there was a part of the script that let you access them from the top down.