saveScreenshot(content || window);

function saveScreenshot(win) {
    var ww = win.innerWidth + win.scrollMaxX;
    var wh = win.innerHeight + win.scrollMaxY;

    var canvas = document.createElementNS("http://www.w3.org/1999/xhtml", "canvas");

    var maxIterations = 500;
    var stopTime = Date.now() + 10000;

    var w = ww;
    var h = wh;
    var dw = ww;
    var dh = wh;

    function canNext() {
        return i < maxIterations && Date.now() < stopTime && (dw >= 2 || dh >= 2);
    }
    function message(title, s) {
        Components.classes["@mozilla.org/embedcomp/prompt-service;1"]
            .getService(Components.interfaces.nsIPromptService)
            .alert(window, "Save Screenshot :: " + title, s);
    }

    var lastErr;
    for(var i = 0; ; ++i) {
        try {
            canvas.width = w;
            canvas.height = h;
            var context = canvas.getContext("2d");

            context.drawWindow(win, 0, 0, w, h, "rgb(255, 255, 255)");
            var url = canvas.toDataURL("image/png");

            if(i && canNext()) {
                if(h > w && h < wh && dh >= 2) h += (dh /= 2);
                else if(w < ww)                w += (dw /= 2);
                continue;
            }

            i && setTimeout(function() {
                message(
                    "Warning",
                    "Can't save entire page: "
                        + ww + "x" + wh
                        + " => " + Math.round(w) + "x" + Math.round(h)
                        + "\nLast error:\n" + lastErr
                );
            }, 0);

            var fileName = win.document.title
                .replace(/[\\\/:*?"<>|\s]+/g, "_");
            if("saveImageURL" in window)
                saveImageURL(url, fileName + ".png");
            else {
                Components.classes["@mozilla.org/appshell/window-mediator;1"]
                    .getService(Components.interfaces.nsIWindowMediator)
                    .getMostRecentWindow("navigator:browser")
                    .saveImageURL(url, fileName + ".png");
            }
            return true;
        }
        catch(e) {
            lastErr = e;
            if(!canNext()) {
                Components.utils.reportError(e);
                message("Error", "Iteration: " + i + "\nError:\n" + e);
                break;
            }
            if(h > w && dh >= 2) h -= (dh /= 2);
            else                 w -= (dw /= 2);
        }
    }
    return false;
}

saveScreenshot(content || window);

function saveScreenshot(win) {
    var ww = win.innerWidth + win.scrollMaxX;
    var wh = win.innerHeight + win.scrollMaxY;

    var canvas = document.createElementNS("http://www.w3.org/1999/xhtml", "canvas");

    var maxIterations = 200;
    var stopTime = Date.now() + 12000;

    var w = ww;
    var h = wh;
    var dw = ww;
    var dh = wh;

    function canNext() {
        return i < maxIterations && Date.now() < stopTime && (dw >= 2 || dh >= 2);
    }
    function message(title, s) {
        Components.classes["@mozilla.org/embedcomp/prompt-service;1"]
            .getService(Components.interfaces.nsIPromptService)
            .alert(window, "Save Screenshot :: " + title, s);
    }
    function getFileName(iw, ih) {
        return fileName
            + (cw > 1 || ch > 1 ? "-part" : "")
            + (ch > 1 ? "-" + ih : "")
            + (cw > 1 ? "-" + iw : "")
            + ".png";
    }

    var lastErr;
    for(var i = 0; ; ++i) {
        try {
            canvas.width = w;
            canvas.height = h;
            var context = canvas.getContext("2d");

            context.drawWindow(win, 0, 0, w, h, "rgb(255, 255, 255)");
            var url = canvas.toDataURL("image/png");

            if(i && canNext()) {
                if(h > w && h < wh && dh >= 2) h += (dh /= 2);
                else if(w < ww)                w += (dw /= 2);
                continue;
            }

            if(i) {
                var cw = Math.ceil(ww/w);
                var ch = Math.ceil(wh/h);
                setTimeout(function() {
                    message(
                        "Warning",
                        "Can't save entire page: "
                            + ww + " x " + wh
                            + " => " + Math.round(w) + " x " + Math.round(h)
                            + "\nParts: " + cw + " x " + ch + " = " + cw*ch
                            + "\n\nLast error:\n" + lastErr
                    );
                }, 0);
            }

            var fileName = win.document.title
                .replace(/[\\\/:*?"<>|\s]+/g, "_");

            var saveImageURL = "saveImageURL" in window
                ? window.saveImageURL // See chrome://global/content/contentAreaUtils.js
                : Components.classes["@mozilla.org/appshell/window-mediator;1"]
                    .getService(Components.interfaces.nsIWindowMediator)
                    .getMostRecentWindow("navigator:browser")
                    .saveImageURL;
            saveImageURL(url, getFileName(1, 1));

            if(i) { // Try save page parts...
                for(var ih = 1; ih <= ch; ++ih) {
                    for(var iw = 1; iw <= cw; ++iw) {
                        var x = w*(iw - 1);
                        var y = h*(ih - 1);
                        if(!x && !y) // This is initial part, already saved
                            continue;
                        var _w = iw < cw ? w : ww - x;
                        var _h = ih < ch ? h : wh - y;

                        setTimeout(function(x, y, w, h, iw, ih) {
                            canvas.width = w;
                            canvas.height = h;
                            context = canvas.getContext("2d");

                            context.drawWindow(win, x, y, w, h, "rgb(255, 255, 255)");
                            url = canvas.toDataURL("image/png");

                            saveImageURL(url, getFileName(iw, ih));
                        }, 0, x, y, _w, _h, iw, ih);
                    }
                }
            }
            return true;
        }
        catch(e) {
            lastErr = e;
            if(!canNext()) {
                Components.utils.reportError(e);
                message("Error", "Iteration: " + i + "\nError:\n" + e);
                break;
            }
            if(h > w && dh >= 2) h -= (dh /= 2);
            else                 w -= (dw /= 2);
        }
    }
    return false;
}

//Стоп, при открытии настройки панелей....................................................
if (window.qwertyRun == 'stop') return;

this.clickBtn = function(event) {
    if (event.button == 0) {
        event.preventDefault();
        alert("cb click " + Date.now());
    }
}
this.addEventListener("click", this.clickBtn, true); 
window.qwertyRun = 'stop';

// удаление обработчиков для адресной строки, при открытии настройки панелей
this.onDestroy = function() {
document.getElementById("urlbar").removeEventListener("dblclick", mclick, false);
document.getElementById("urlbar").removeEventListener("mousedown", function(e){if(!gURLBar.focused) goDoCommand("cmd_copy");}, false)
};

// добавляем обработчики для адресной строки........ 
document.getElementById("urlbar").addEventListener("dblclick", mclick, false);
//копировать выделенный текст на странице
document.getElementById("urlbar").addEventListener("mousedown", function(e){if(!gURLBar.focused) goDoCommand("cmd_copy");}, false);

/*Initialization code*/
// constructor example - change button type property
// destructor  example - close window
// update      example - edit button
// delete      example - delete button
LOG("test 2");
this.onDestroy = function(reason) {
  LOG("test 1");
  if (reason == "constructor") LOG("constructor");
  if (reason == "destructor")  LOG("destructor");
  if (reason == "update")      LOG("update");
  if (reason == "delete")      LOG("delete");
}