var newtabhomepage = {

  init: function ()
  {
    gBrowser.removeEventListener("NewTab", BrowserOpenTab, false);
    window.BrowserOpenTab = newtabhomepage.opentab;
    
    // explicitly add new listener
    gBrowser.addEventListener("NewTab", newtabhomepage.opentab, false);
    
    newtabhomepage.prefs = Components.classes['@mozilla.org/preferences-service;1']
                           .getService(Components.interfaces.nsIPrefService);
  },
  
  opentab: function (aEvent)
  {
    // Firefox allows multiple piped homepages, take the first if necessary
    var homepage = gHomeButton.getHomePage().split("|")[0];
    var newtab = gBrowser.addTab(homepage);
    if (newtabhomepage.prefs.getBoolPref("newtabhomepage.selectnewtab"))
    {
      gBrowser.selectedTab = newtab;
      if (gURLBar)
        setTimeout(function() { 
          // if page is about:blank select() works just like focus, two birds one stone
          gURLBar.select();
        }, 0);
    }
    if (aEvent)
      aEvent.stopPropagation();
      
    return newtab;
  }

}
newtabhomepage.init();

// если нужен клик правой кнопкой то тут if (event.button != 0)  меняем 0 на 2
(function() {
        // Get the root branch
        var prefs = Components.classes["@mozilla.org/preferences-service;1"]
                     .getService(Components.interfaces.nsIPrefBranch);

        //getting prefs Unicode value
        var HomeUrl = prefs.getComplexValue("browser.startup.homepage",
        Components.interfaces.nsISupportsString).data;
        
//Homepage tab, clear URLBar................................
var enabled = [HomeUrl,];
  
gBrowser.tabContainer.addEventListener("TabSelect", function(event) {
        if (enabled.indexOf(content.location.href) != -1)
        gURLBar.value = "";
        gURLBar.focus();
}, false);

document.addEventListener( "DOMContentLoaded", function(event){
        if (enabled.indexOf(content.location.href) != -1)
        gURLBar.value = "";
        gURLBar.focus();
}, false);       
        
        
        
gBrowser.mTabContainer.addEventListener("click", function (event){
  if (event.button != 0) {
        return;
    }
    event.preventDefault();
    event.stopPropagation();
    document.getElementById("tabContextMenu").hidePopup();
    gBrowser.selectedTab = gBrowser.addTab(HomeUrl);
}, false);

})();

Выделить кодКод:// Двойной клик левой кнопкой на табе, открыть домашнюю страницу.
// If  double left click in Tab, the Homepage open in New Tab.

function NewTabHome(event){
// удаление обработчика, если функция уже выполнялась
if (arguments.callee.done) removeEventListener("dblclick", NewTabHome, false, gBrowser.mTabContainer);

// устанавливаем флаг, чтобы обработчик не исполнялась дважды
arguments.callee.done = true;

if (event.button != 0) return;
          event.preventDefault();
          event.stopPropagation();
 
    var HomeUrl = gPrefService.getCharPref("browser.startup.homepage");
    gBrowser.selectedTab = gBrowser.addTab(HomeUrl);
};
addEventListener("dblclick", NewTabHome, false, gBrowser.mTabContainer);спасибо okkamas_knife удаление обработчика помогла.

this.pref='userChrome.autocopy.autocopyState';
this.setState = function() {
var state;
try {
state = this.PS.getIntPref(this.pref);
if(state == 2) {
this.image = 'data:image/x-icon;base64,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';
} else {
this.image = 'data:image/x-icon;base64,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';
}
} catch(ex) {
state = this.PS.setIntPref(this.pref, 2);
}
}

this.PS = Components.classes['@mozilla.org/preferences-service;1']
.getService(Components.interfaces.nsIPrefBranch);
this.ob = {};
this.ob.observe = this.setState.bind(this);
this.PS.addObserver(this.pref,this.ob,false);
this.setState();



(function() {
  var lastSelection = "";
  var prefs = Cc["@mozilla.org/preferences-service;1"].getService(Ci.nsIPrefBranch);
  if(!prefs.getPrefType("userChrome.autocopy.autocopyState")) prefs.setIntPref("userChrome.autocopy.autocopyState", 2);

  function autocopyStart(e) {
    lastSelection = getBrowserSelection();
  }

  function autocopyStop(e) {
    var prefs = Cc["@mozilla.org/preferences-service;1"].getService(Ci.nsIPrefBranch);
    var autocopyState = prefs.getIntPref("userChrome.autocopy.autocopyState");
    var selection = getBrowserSelection();

    if(autocopyState>1 && selection && selection!=lastSelection) {
      goDoCommand('cmd_copy');

 
      
    }
  }

  gBrowser.mPanelContainer.addEventListener("mousedown", autocopyStart, false);
  gBrowser.mPanelContainer.addEventListener("mouseup", autocopyStop, false);
})();


/* Middle button Paste ................. */

(function() {
  if ("gBrowser" in window && gBrowser && gBrowser.localName == "tabbrowser") {
    for (var i=0; i<gBrowser.mTabs.length; i++) {
      var browser = gBrowser.getBrowserForTab(gBrowser.mTabs[i]);
      eval("browser.isAutoscrollBlocker = " + browser.isAutoscrollBlocker.toString()
        .replace("node instanceof HTMLTextAreaElement", "$& || node.ownerDocument && node.ownerDocument.designMode == 'on'")
      );
    }

    gBrowser.mTabContainer.addEventListener("TabOpen", function(event) {
      var browser = gBrowser.getBrowserForTab(event.target);
      eval("browser.isAutoscrollBlocker = " + browser.isAutoscrollBlocker.toString()
        .replace("node instanceof HTMLTextAreaElement", "$& || node.ownerDocument && node.ownerDocument.designMode == 'on'")
      );
    }, false);
  }

  window.addEventListener("click", function(event) {
    if (event.button != 1 || event.ctrlKey || event.altKey || event.shiftKey || event.metaKey)
      return;

    try {
      var prefs = Components.classes["@mozilla.org/preferences-service;1"].getService(Components.interfaces.nsIPrefBranch);
      var mmPaste = prefs.getBoolPref("middlemouse.paste");
    }
    finally {
      if (!mmPaste)
        return;
    }

    var node = event.originalTarget;
    while (node) {
      if (node instanceof HTMLInputElement
          || node instanceof HTMLTextAreaElement
          || node.ownerDocument && node.ownerDocument.designMode == "on") {
        var controller = top.document.commandDispatcher.getControllerForCommand("cmd_paste");
        if (controller && controller.isCommandEnabled("cmd_paste")) {
          controller.doCommand("cmd_paste");
        }

        event.stopPropagation();
        return;
      }
      node = node.parentNode;
    }
  }, true);
})();



// Copy Tab Info.....................................
(function() {
    var htmlEscape = function(s) {
        s = s.replace(/&/g, "&amp;");
        s = s.replace(/>/g, "&gt;");
        s = s.replace(/</g, "&lt;");
        s = s.replace(/"/g, "&quot;");
        return s;
    };
    
    var copyTabInfo = function (aAsHTML) {
        var tab = document.popupNode;
        var title = tab.label;
        var url = gBrowser.getBrowserForTab(tab).contentWindow.location.href;
        var txt = aAsHTML ?
                  '<a href="' + htmlEscape(url) + '">' + htmlEscape(title) + '</a>' :
                  title + "\n" + url;
        Cc["@mozilla.org/widget/clipboardhelper;1"]
        .getService(Ci.nsIClipboardHelper)
        .copyString(txt);
    };    
    
        
    var menuitem1 = document.createElement("menuitem");
    menuitem1.setAttribute("label", "\Copy the Title and URL");
    menuitem1.addEventListener("command", function() { copyTabInfo(false); }, false);
        
    setTimeout(function() {
        gBrowser.mStrip.childNodes[1].appendChild(document.createElement("menuseparator"));
        gBrowser.mStrip.childNodes[1].appendChild(menuitem1);
        
    }, 0);

})();


//dblclick copy........................................
gBrowser.addEventListener("dblclick", function(event) {
    if (event.button != 2) {
        return;
    }
    event.preventDefault();
    document.getElementById("contentAreaContextMenu").hidePopup();
    document.getElementById("cmd_copy").doCommand();
}, false);