【已解决】Firefox70.0a1下以下脚本失效，请大家帮忙，谢谢

new function () {
    var items = [
    {label:"复制当前标签【标题】",
    oncommand: function() {addMenu.copy(addMenu.convertText("%TITLE%"));},
    image:"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAAXElEQVQ4jWNgGCzgPxZMSA2GJKkWEmXAfwYGBg9yDfBgYGCYCcXEWogCjjIwMChDaZIBssY8KCYJ5DGghjhJrlBmwPTjTKg4ToCsAVvAeaCJ0S8dkGQARUl54AAAWsMsNkwmkt8AAAAASUVORK5CYII="},
    {label:"复制当前标签【地址】",oncommand: function() {addMenu.copy(addMenu.convertText("%URL%"));},image:""},
    {label:"复制当前标签标题和地址",
    oncommand: function() {addMenu.copy(addMenu.convertText("%TITLE%\n%URL%"));},image:""},
    {label:"复制当前标签源代码",oncommand: function() {addMenu.copy(addMenu.convertText( '<a href="%URL%" target="_blank">%TITLES%</a>'));},image:""},
{},
{label:"复制所有标签标题",oncommand: function() {(function(){
                        var gClipboardHelper = Components.classes['@mozilla.org/widget/clipboardhelper;1'].getService(Components.interfaces.nsIClipboardHelper);
            var titles = "";
            Array.slice(gBrowser.tabContainer.childNodes).forEach(function(tab) {
                titles += tab.label + "\n";
            });
            gClipboardHelper.copyString(titles);   
    })();},image:""},
        {label:"复制所有标签地址",oncommand: function() {(function(){
            var gClipboardHelper = Components.classes['@mozilla.org/widget/clipboardhelper;1'].getService(Components.interfaces.nsIClipboardHelper);
            var URLs = "";
            Array.slice(gBrowser.tabContainer.childNodes).forEach(function(tab) {
                var url = gBrowser.getBrowserForTab(tab).currentURI.spec;
                URLs += url + "\n";
            });
            gClipboardHelper.copyString(URLs);      
    })();},image:""},
        {label:"复制所有标签标题和地址",oncommand: function() {(function() {
            var gClipboardHelper = Components.classes['@mozilla.org/widget/clipboardhelper;1'].getService(Components.interfaces.nsIClipboardHelper);
                                                var txt = "";
            Array.slice(gBrowser.tabContainer.childNodes).forEach(function(tab) {
                 var url = gBrowser.getBrowserForTab(tab).currentURI.spec;
                txt += tab.label + "\n" + url + "\n";
            });
            gClipboardHelper.copyString(txt); 
        })();},image:""},
        {label:"复制所有标签HTML链接",oncommand: function() {(function() {
            var gClipboardHelper = Components.classes['@mozilla.org/widget/clipboardhelper;1'].getService(Components.interfaces.nsIClipboardHelper);
            var txt = "";
            Array.slice(gBrowser.tabContainer.childNodes).forEach(function(tab) {
                 var url = gBrowser.getBrowserForTab(tab).currentURI.spec;
                txt += "<a href=" + "\""+ url +"\" "+  "target=\"_blank\">" +  tab.label + "</a>"+ ""+ "\r";
            });
            gClipboardHelper.copyString(txt);  
        })();},image:""},
   
    {},
    {
        label:"复制 Favicon 的 URL",
        text:"%FAVICON%",
        image:" "
    }, {
        label:"复制 Favicon 的 Base64",
        text:"%FAVICON_BASE64%",
        image:" "
    }
    ];
    var menu = TabMenu({id:"context_TabInfoCopy",onpopupshowing: syncHidden});
    menu(items);
};

lonely_8：Array.slice(gBrowser.tabContainer.childNodes)
改为
gBrowser.tabs回到原帖