@-moz-document url("about:newtab"), url("about:home") {
.ds-top-sites .top-sites .top-site-outer {
    padding-inline: 16px !important;
}
.ds-top-sites .top-sites .top-sites-list {
    margin-inline: -16px !important;
}
.ds-outer-wrapper-breakpoint-override main {
    width: 274px !important;
}
@media (min-width: 610px) {
.ds-outer-wrapper-breakpoint-override main {
    width: 530px !important;
}
.outer-wrapper.ds-outer-wrapper-breakpoint-override {
    padding-inline: 20px !important;
}
}
@media (min-width: 866px) {
.ds-outer-wrapper-breakpoint-override main {
    width: 786px !important;
}
.outer-wrapper.ds-outer-wrapper-breakpoint-override {
    padding-inline: 32px !important;
}
}
@media (min-width: 1122px) {
.ds-outer-wrapper-breakpoint-override main {
    width: 1042px !important;
}
}
}

#panelMenu_recentBookmarks {
    background-repeat: no-repeat !important;
    background-position: left 12px center !important;
    background-size: 16px !important;
    background-image: url("chrome://browser/skin/bookmark.svg") !important;
    -moz-context-properties: fill;
    fill: currentColor;
    padding-inline-start: 36px !important;
    margin-inline-start: 0 !important;
    min-height: 16px !important;
    color: var(--toolbarbutton-icon-fill-attention, currentColor) !important;
}
#panelMenu_recentBookmarks:-moz-locale-dir(rtl) {
    background-position-x: right 12px !important;
}

#alltabs-button,
:root:not([customizing]) #TabsToolbar #new-tab-button,
#tabbrowser-arrowscrollbox > spacer {
    display: none !important;
}

// Этот скрипт работает в главном окне браузера если включено в настройках

var ucf_custom_script_win = {
    initialized: false,
    unloadlisteners: [],
    load: function() {
        if (this.initialized)
            return;
        this.initialized = true;
        // this.specialwidgets.constructor(); // <-- Special Widgets
        // this.autohidesidebar.constructor(); // <-- Auto Hide Sidebar
        /* ************************************************ */
        this.contextmenuopenwith.constructor();
        // Здесь может быть ваш код который сработает по событию "load" не раньше

        /* ************************************************ */
        if (this.unloadlisteners.length < 1)
            return;
        window.addEventListener("unload", this, false);
    },
    handleEvent: function(event) {
        this[event.type](event);
    },
    unload: function() {
        window.removeEventListener("unload", this, false);
        this.unloadlisteners.forEach((str) => {
            try {
                this[str].destructor();
            } catch (e) {}
        });
    },
contextmenuopenwith: {
        _eventlisteners: [],
        constructor: function() {
            var attrimage = true; // true или false Добавить иконки (атрибут "image") или нет
            var submenu = false; // true или false Добавить подменю для пунктов или нет
            // ['ID пункта', 'имя приложения', 'путь к приложению', 'аргументы через пробел (то что в двойных кавычках считается за один аргумент)', 'иконка (для ОС Windows необязательно)'],
            var arrayWindows = [ // для Windows
                ["iexplore", "IE", "C:\\Program Files\\Internet Explorer\\iexplore.exe", "%OpenURI"],
                ["TOR Browser", "TOR", "C:\\Portable\\Tor Browser\\Browser\\firefox.exe", "-P,default,-new-tab,%OpenURI"],           
            ];
            var arrayLinux = [ // для Linux
                ['smplayer', 'SMPlayer', '/usr/bin/smplayer', '%OpenURI', 'moz-icon://stock/smplayer?size=menu'],
                ['vlc', 'VLC', '/usr/bin/vlc', '%OpenURI', 'moz-icon://stock/vlc?size=menu'],
                ['uget', 'uGet', '/usr/bin/uget-gtk', '%OpenURI', 'moz-icon://stock/uget-icon?size=menu'],
            ];
            var arrayMacos = [ // для MacOS
                [],
            ];

            var arrayOS, platform = AppConstants.platform, length;
            if (platform == "win")
                arrayOS = arrayWindows;
            else if (platform == "linux")
                arrayOS = arrayLinux;
            else if (platform == "macosx")
                arrayOS = arrayMacos;
            else
                return;
            if (!(length = arrayOS.length))
                return;
            var addEventListener = this.addEventListener.bind(this);
            ucf_custom_script_win.unloadlisteners.push("contextmenuopenwith");
            var popup = document.querySelector("#contentAreaContextMenu"), seppage = popup.querySelector("#context-sep-viewbgimage"), sepopen = popup.querySelector("#context-sep-open"),
            fragpage = document.createDocumentFragment(), fraglink = document.createDocumentFragment(), subpage = "", sublink = "";
            if (length == 1)
                submenu = false;
            if (!submenu) {
                subpage = "Открыть страницу в ";
                sublink = "Открыть ссылку в ";
            }
            arrayOS.forEach(item => {
                var id = item[0], name = item[1], path = item[2], arg = !item[3] ? "" : item[3], iconpath;
                if (!id || !name || !path)
                    return;
                var menuitem_0 = document.createXULElement("menuitem");
                menuitem_0.id = `open-current-page-with-${id}`;
                menuitem_0.className = "menuitem-iconic open-current-page-with-application";
                menuitem_0.setAttribute("label", `${subpage}${name}`);
                menuitem_0.applicationpath = path;
                menuitem_0.applicationarg = arg;
                if (attrimage) {
                    iconpath = !item[4] ? (`moz-icon://file://${path}?size=16`) : item[4];
                    menuitem_0.setAttribute("image", iconpath);
                }
                fragpage.append(menuitem_0);
                addEventListener(menuitem_0, "command", function(event) {
                    try {
                        var target = event.currentTarget, arg = target.applicationarg, file = Cc["@mozilla.org/file/local;1"].createInstance(Ci.nsIFile);
                        file.initWithPath(target.applicationpath);
                        if (!file.exists() || !file.isExecutable()) return;
                        arg = (arg !== "") ? arg.split(/\s+(?=(?:[^"]*"[^"]*")*[^"]*$)/g).map(sp => {
                            if (/%OpenURI/g.test(sp))
                                return sp.replace(/^"|"$/g, "").replace("%OpenURI", decodeURIComponent(gBrowser.currentURI.spec));
                            return sp.replace(/^"|"$/g, "");
                        }) : [];
                        var process = Cc["@mozilla.org/process/util;1"].createInstance(Ci.nsIProcess);
                        process.init(file);
                        process.runwAsync(arg, arg.length);
                    } catch(e) {}
                });
                var menuitem_1 = document.createXULElement("menuitem");
                menuitem_1.id = `open-link-with-${id}`;
                menuitem_1.className = "menuitem-iconic open-link-with-application";
                menuitem_1.setAttribute("label", `${sublink}${name}`);
                menuitem_1.applicationpath = path;
                menuitem_1.applicationarg = arg;
                if (attrimage)
                    menuitem_1.setAttribute("image", iconpath);
                fraglink.append(menuitem_1);
                addEventListener(menuitem_1, "command", function(event) {
                    try {
                        var target = event.currentTarget;
                        var arg = target.applicationarg;
                        var file = Cc["@mozilla.org/file/local;1"].createInstance(Ci.nsIFile);
                        file.initWithPath(target.applicationpath);
                        if (!file.exists() || !file.isExecutable() || !window?.gContextMenu?.linkURL) return;
                        arg = (arg !== "") ? arg.split(/\s+(?=(?:[^"]*"[^"]*")*[^"]*$)/g).map(sp => {
                            if (/%OpenURI/g.test(sp))
                                return sp.replace(/^"|"$/g, "").replace("%OpenURI", decodeURIComponent(gContextMenu.linkURL));
                            return sp.replace(/^"|"$/g, "");
                        }) : [];
                        var process = Cc["@mozilla.org/process/util;1"].createInstance(Ci.nsIProcess);
                        process.init(file);
                        process.runwAsync(arg, arg.length);
                    } catch(e) {}
                });
            });
            if (!submenu) {
                seppage.before(fragpage);
                sepopen.before(fraglink);
            } else {
                let menu = document.createXULElement("menu");
                menu.id = "open-current-page-with-submenu";
                menu.className = "menu-iconic open-current-page-with-application";
                menu.setAttribute("label", "Открыть страницу в...");
                let menupopup = document.createXULElement("menupopup");
                menupopup.append(fragpage);
                menu.append(menupopup);
                seppage.before(menu);
                menu = document.createXULElement("menu");
                menu.id = "open-link-with-submenu";
                menu.className = "menu-iconic open-link-with-application";
                menu.setAttribute("label", "Открыть ссылку в...");
                menupopup = document.createXULElement("menupopup");
                menupopup.append(fraglink);
                menu.append(menupopup);
                sepopen.before(menu);
            }
            var style = "data:text/css;charset=utf-8," + encodeURIComponent(`
                #contentAreaContextMenu #context-openlink:not([hidden="true"]) ~ .open-current-page-with-application,
                #contentAreaContextMenu #context-openlink[hidden="true"] ~ .open-link-with-application {
                    display: none !important;
                }
            `);
            windowUtils.loadSheetUsingURIString(style, windowUtils.USER_SHEET);
        },
        addEventListener: function(...arr) {
            var elm = arr[0];
            if (!elm)
                return;
            elm.addEventListener(...arr.slice(1));
            this._eventlisteners.push(arr);
        },
        destructor: function() {
            for(var arr of this._eventlisteners)
                arr.shift().removeEventListener(...arr);
            delete this._eventlisteners;
        }
    },
    autohidesidebar: {
        sidebar: null,
        constructor: function() {
            var sidebar = this.sidebar = document.querySelector("#sidebar-box");
            if(!sidebar)
                return;
            ["dragenter", "drop", "dragexit"].forEach((type) => {
                sidebar.addEventListener(type, this, false);
            });
            ucf_custom_script_win.unloadlisteners.push("autohidesidebar");
        },
        destructor: function() {
            var sidebar = this.sidebar;
            ["dragenter", "drop", "dragexit"].forEach((type) => {
                sidebar.removeEventListener(type, this, false);
            });
        },
        handleEvent: function(event) {
            this[event.type](event);
        },
        dragenter: function() {
            if (!this.sidebar.hasAttribute("sidebardrag"))
            this.sidebar.setAttribute("sidebardrag", "true");
        },
        drop: function() {
            if (this.sidebar.hasAttribute("sidebardrag"))
            this.sidebar.removeAttribute("sidebardrag");
        },
        dragexit: function(event) {
            var sidebar = this.sidebar;
            var boxObj = sidebar.getBoundingClientRect(), boxScrn = !sidebar.boxObject ? sidebar : sidebar.boxObject;
            if ((!event.relatedTarget || event.screenY <= (boxScrn.screenY + 5) || event.screenY  >= (boxScrn.screenY + boxObj.height - 5)
                || event.screenX <= (boxScrn.screenX + 5) || event.screenX >= (boxScrn.screenX + boxObj.width - 5))
                && sidebar.hasAttribute("sidebardrag"))
                sidebar.removeAttribute("sidebardrag");
        }
    }
};

if (window.document.readyState != "complete") {
    window.addEventListener("load", function load() {
        window.removeEventListener("load", load, false);
        ucf_custom_script_win.load();
    }, false);
} else
    ucf_custom_script_win.load();