// Open Link in New Tab [Alternative] (Tab in Background)
// Opens a new tab by faking a click on the link.

const IN_FOREGROUND = false;

// Check if it's a link the gesture started from, if yes open link in new tab
if (FireGestures.getLinkURL(FireGestures.sourceNode)) {
  // Create a click event
  var event = document.createEvent("MouseEvents");
  event.initMouseEvent("click", true, true, window, 0, 0, 0, 0, 0,
    // Control key - true to open new tab,
    // else current tab is used
    true,
    // Alt key - unnecessary for this script
    false,
    // Shift key - true to open in new window,
    // or if ctrl is pressed open the tab in
    // foreground, else opened in background
    IN_FOREGROUND,
    false, 0, null);
  // Dispatch the event for the "clicked" link
  FireGestures.sourceNode.dispatchEvent(event);
}

  // Open linked-to URL in a new tab.
  openLinkInTab: function() {
    openNewTabWith(this.linkURL, this.target.ownerDocument, null, null, false);
  },

function openNewTabWith(aURL, aDocument, aPostData, aEvent,
                        aAllowThirdPartyFixup, aReferrer)
{
  if (aDocument)
    urlSecurityCheck(aURL, aDocument.nodePrincipal);

  var prefSvc = Components.classes["@mozilla.org/preferences-service;1"]
                          .getService(Components.interfaces.nsIPrefService);
  prefSvc = prefSvc.getBranch(null);

  // should we open it in a new tab?
  var loadInBackground = true;
  try {
    loadInBackground = prefSvc.getBoolPref("browser.tabs.loadInBackground");
  }
  catch(ex) {
  }

  if (aEvent && aEvent.shiftKey)
    loadInBackground = !loadInBackground;

  // As in openNewWindowWith(), we want to pass the charset of the
  // current document over to a new tab.
  var wintype = document.documentElement.getAttribute("windowtype");
  var originCharset;
  if (wintype == "navigator:browser")
    originCharset = window.content.document.characterSet;

  // open link in new tab
  var referrerURI = aDocument ? aDocument.documentURIObject : aReferrer;
  var browser = top.document.getElementById("content");
  return browser.loadOneTab(aURL, {
                            referrerURI: referrerURI,
                            charset: originCharset,
                            postData: aPostData,
                            inBackground: loadInBackground,
                            allowThirdPartyFixup: aAllowThirdPartyFixup});
}

   _performAction: function(event, aCommand) {
...
...
         case "FireGestures:OpenLinkInBgTab":
         case "FireGestures:OpenLinkInFgTab":
            var linkURL = this.getLinkURL();
            if (!linkURL)
               throw this._getLocaleString("ERROR_NOT_ON_LINK");
            var doc = this.sourceNode.ownerDocument;
            this.checkURL(linkURL, doc);
            var charset = window.content.document.characterSet;
            var referer = makeURI(doc.location.href);
            var background = aCommand == "FireGestures:OpenLinkInBgTab";
            gBrowser.loadOneTab(linkURL, referer, charset, null, background, false);
            break;
...
...
   },

this.preInitSortingAndGroupingMethodHooks = function preInitSortingAndGroupingMethodHooks(event) {
...
...
}

try{tabkit.addingTab("related");}catch (ex) {}
var srcNode = FireGestures.sourceNode;
var linkURL = FireGestures.getLinkURL(srcNode);
if (!linkURL)
  throw FireGestures._getLocaleString("ERROR_NOT_ON_LINK");
var doc = srcNode.ownerDocument;
var charset = window.content.document.characterSet;
var referer = makeURI(doc.location.href);
var background = true; //在背景開啟
gBrowser.loadOneTab(linkURL, referer, charset, null, background, false);
try{tabkit.addingTabOver();}catch (ex) {}

try{tabkit.addingTab("related");}catch (ex) {}
FireGestures._performAction(event, "FireGestures:OpenLinkInFgTab");
try{tabkit.addingTabOver();}catch (ex) {}