"地址栏输入网址 在新的页面打开"脚本失效

/*open url in new tab */
    try {
        var new_str = '_LoadURL(aTriggeringEvent, ';
        var old_str = /if \(aTriggeringEvent instanceof MouseEvent\) {/;
        try { // firefox 3.0.*
            eval("BrowserLoadURL = "+ BrowserLoadURL.toString().replace(
                old_str, new_str+' aPostData); return; $&'));
        }
        catch(e) { // firefox 3.1
            var urlbar = document.getElementById("urlbar");
            eval("urlbar.handleCommand="+ urlbar.handleCommand.toString(
                ).replace(old_str, new_str+' postData); return; $&'));
        }
    }catch(e){}