....
    get textLabel() {
      return this.querySelector(".tab-label");
    }

(async () => CustomizableUI.createWidget({

	path: ["_QTranslate", "QTranslate.exe"],

	id: "805678",
	label: "label",
	tooltiptext: "tooltiptext",

	localized: false,
	onCreated(btn) {
		btn._handleClick = () => this.click();
		btn.image = "chrome://browser/content/robot.ico";
	},
	click() {
		var file = Services.dirsvc.get("ProfD", Ci.nsIFile);
		this.path.forEach(file.append);

		// See https://gist.github.com/Noitidart/0de3be2442a0295eb386
		// vk codes: https://learn.microsoft.com/en-us/windows/win32/inputdev/virtual-key-codes

		// Double Ctrl [Ctrl-Down, Ctrl-Up, Ctrl-Down, Ctrl-Up]
		var data = [[0x11, false], [0x11, true], [0x11, false], [0x11, true]];

		var {ctypes} = ChromeUtils.importESModule("resource://gre/modules/ctypes.sys.mjs");
		var KEYBDINPUT = ctypes.StructType("tagKEYBDINPUT", [
			{wVk: ctypes.unsigned_short},
			{wScan: ctypes.unsigned_short},
			{dwFlags: ctypes.unsigned_long},
			{time: ctypes.unsigned_long},
			{dwExtraInfo: ctypes.voidptr_t.size == 8 ? ctypes.uint64_t : ctypes.unsigned_long},
			{padding0: ctypes.uint8_t.array(8)}
		]);
		var INPUT = ctypes.StructType("tagINPUT", [{type: ctypes.unsigned_long}, {ki: KEYBDINPUT}]);
		var pInputs = INPUT.array()(data.map(([vkCode, keyup]) => 
			INPUT(1, KEYBDINPUT(vkCode, 0, keyup ? 2 : 0, 0, 0, ctypes.uint8_t.array(8)()))
		));
		var declareArgs = ["SendInput", ctypes.winapi_abi, ctypes.unsigned_int, ctypes.unsigned_int, INPUT.ptr, ctypes.int];
		var sendArgs = [pInputs.length, pInputs, INPUT.size];
		var send = () => {
			var user32 = ctypes.open("user32");
			try {user32.declare(...declareArgs)(...sendArgs);}
			finally {user32?.close();}
		}
		(this.click = () => {
			var process = Cc["@mozilla.org/process/util;1"].createInstance(Ci.nsIProcess);
			process.init(file);
			process.runwAsync(null, 0);
			setTimeout(send, 100);
		})();
	}
}))();

/* https://forum.mozilla-russia.org/viewtopic.php?pid=786917#p786917 ||000|001Alt|101Ctrl+Alt|100Ctrl|110Ctrl+Shift
   <Vit.V. https://forum.mozilla-russia.org/viewtopic.php?pid=786906#p786906 786926#p786926
   https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/code/code_values 
   https://forum.mozilla-russia.org/viewtopic.php?pid=787019#p78701>
   https://support.mozilla.org/ru/kb/sochetaniya-klavish#w_okna-i-vkladki || https://support.mozilla.org/en-US/kb/keyboard-shortcuts-perform-firefox-tasks-quickly
============================================================ */
(this.keyboardshortcuts={
get skip(){return docShell.isCommandEnabled("cmd_insertText");},
get ch(){delete this.ch;return this.ch=Cc["@mozilla.org/widget/clipboardhelper;1"].getService(Ci.nsIClipboardHelper);},
init(that){var keydown={

"Backquote":{"false_false_false":(e)=>{this.skip||PlacesCommandHook.showPlacesOrganizer("BookmarksMenu");}},
"Digit1":{"false_false_false":(e)=>{this.skip||window.document.getElementById("unified-extensions-button").click();}},
"Digit2":{"false_false_false":(e)=>{this.skip||BrowserOpenAddonsMgr();}},
"Digit3":{"false_false_false":(e)=>{this.skip||openPreferences();}},
"Digit4":{"false_false_false":(e)=>{this.skip||duplicateTabIn(gBrowser.selectedTab,'tab');}},
"Digit5":{"false_false_false":(e)=>{if(this.skip)return;var s=prompt('Google_ site:.. ..','');if(s.length>0)gBrowser.addTrustedTab('https://www.google.com/search?q=site:'+encodeURIComponent(gBrowser.currentURI.host)+' '+encodeURIComponent(s));}},
"Digit6":{"false_false_false":(e)=>{if(this.skip)return;var p=Services.dirsvc.get('GreD',Ci.nsIFile);p.initWithPath(p.path+"\\..\\..\\..\\_Photo\\ShareX\\ShareX.exe");p.launch();}},
"Digit7":{"false_false_false":(e)=>{if(this.skip)return;gBrowser.fixupAndLoadURIString("javascript:(function(){var EnRuT=[['щ','shh'],['Щ','Shh'],['Щ','SHH'],['х','hh'],['Х','Hh'],['Х','HH'],['ж','zh'],['Ж','Zh'],['Ж','ZH'],['ц','cz'],['Ц','Cz'],['Ц','CZ'],['ю','yu'],['Ю','Yu'],['Ю','YU'],['ё','yo'],['Ё','Yo'],['Ё','YO'],['я','ya'],['Я','Ya'],['Я','YA'],['ч','ch'],['Ч','Ch'],['Ч','CH'],['ш','sh'],['Ш','Sh'],['Ш','SH'],['э','e`'],['Э','E`'],['ы','y'],['Ы','Y'],['ъ','``'],['ь','`'],['р','r'],['т','t'],['у','u'],['и','i'],['о','o'],['п','p'],['а','a'],['с','s'],['д','d'],['ф','f'],['г','g'],['й','j'],['к','k'],['л','l'],['з','z'],['х','x'],['ц','c'],['в','v'],['б','b'],['н','n'],['м','m'],['Р','R'],['Т','T'],['У','U'],['И','I'],['О','O'],['П','P'],['А','A'],['С','S'],['Д','D'],['Ф','F'],['Г','G'],['Й','J'],['К','K'],['Л','L'],['З','Z'],['Х','X'],['Ц','C'],['В','V'],['Б','B'],['Н','N'],['М','M'],['е','e'],['Е','E']],A=document.activeElement;A.onkeyup=function ftr(){for(var s=A.value,i=0;i<EnRuT.length;i++){s=s.replace(RegExp(EnRuT[i][1],'g'),EnRuT[i][0])};A.value=s}})()",{triggeringPrincipal:gBrowser.contentPrincipal});
									}},//AutoTranslit- https://forum.ru-board.com/topic.cgi?forum=5&topic=46779&start=320#15
    "F1":{"false_false_false":(e)=>{FileUtils.getFile('SysD',['sndvol.exe']).launch();}},
    "F2":{"false_false_false":(e)=>{gBrowser.fixupAndLoadURIString("javascript:{d=document;b=d.body;o=d.createElement('scri'+'pt');o.setAttribute('src','https://translate.google.com/translate_a/element.js?cb=googleTranslateElementInit');o.setAttribute('type','text/javascript');b.appendChild(o);v=b.insertBefore(d.createElement('div'),b.firstChild);v.id='google_translate_element';v.style.display='none';p=d.createElement('scri'+'pt');p.text='function googleTranslateElementInit(){new google.translate.TranslateElement({pageLanguage:%22%22},%22google_translate_element%22);}';p.setAttribute('type','text/javascript');b.appendChild(p);}void 0",{triggeringPrincipal:gBrowser.contentPrincipal});
									}},//Enable translation(https://forum.mozilla-russia.org/viewtopic.php?pid=805422#p805422 ||805427#p805427)
    "F3":{"false_false_false":(e)=>{e.preventDefault();gBrowser.fixupAndLoadURIString("javascript:(function(){var night=function(w){(function(d){var css='html{opacity:0.6!important;background:black!important;}body{background:white!important;}';var s=d.getElementsByTagName('style');for(var i=0,si;si=s[i];i++){if(si.innerHTML==css){si.parentNode.removeChild(si);return}};var heads=d.getElementsByTagName('head');if(heads.length){var node=d.createElement('style');node.type='text/css';node.appendChild(d.createTextNode(css));heads[0].appendChild(node)}})(w.document);for(var i=0,f;f=w.frames[i];i++){try{arguments.callee(f)}catch(e){}}};night(window)})();",{triggeringPrincipal:gBrowser.contentPrincipal});
									}},//Night mode(Focus mode)
    "F4":{"false_false_false":(e)=>{e.preventDefault();var vert=`javascript:{const o=["contextmenu","selectstart","select","mousedown","mouseup","cut","copy"],t=["-webkit","-moz","-ms","-khtml",""],e=window.jQuery;[document,document.body,document.documentElement].forEach(n=>{for(const t of o)n["on"+t]=null,e&&e(n).off(t);if(n.style)for(const o of t){const t=[o,"user-select"].join("-");n.style[t]="initial"}})
									};void(0);`;gBrowser.loadURI(Services.io.newURI(vert),{triggeringPrincipal:Services.scriptSecurityManager.getSystemPrincipal()});
									}},//Re-enable selecting & copying text [maple3142] (Bookmarklet)
  "KeyG":{"true_false_false" :(e)=>{e.preventDefault();var bar=document.getElementById("ucf-additional-vertical-bar");setToolbarVisibility(bar,bar.collapsed);}},
  "KeyW":{"false_true_false" :(e)=>{gBrowser.removeAllTabsBut(gBrowser.selectedTab);}},
  "KeyV":{"false_false_false":(e)=>{if(this.skip)return;gClipboard.write(gURLBar.value);glob.flash_bg_text('urlbar-input-container',0,'rgba(240,176,0,0.5)',300);},//300,"CopyURL: "+gURLBar.value.slice(0,80)) 
		  "false_true_false" :(e)=>{e.preventDefault();let url=readFromClipboard();try{switchToTabHavingURI(url,true);}catch(ex){
									var reg=/[a-zA-Z0-9][-a-zA-Z0-9]{0,62}(\.[a-zA-Z0-9][-a-zA-Z0-9]{0,62})+\.?/;
									if(!reg.test(url)){url='https://www.google.com/search?q='+encodeURIComponent(url);
									}else{if(url.substring(4,0).toLowerCase()=="http"){url=encodeURIComponent(url);
									}else{url='http://'+encodeURIComponent(url);}}switchToTabHavingURI(url,true);}
									}},//Open clipboard address
  "KeyU":{"true_true_false"  :(e)=>{FileUtils.getFile('UChrm',['user_chrome_files','_','u.exe']).launch();}},
  "KeyA":{"true_true_false"  :(e)=>{FileUtils.getFile('UChrm',['user_chrome_files','_','.Ev','Everything.exe']).launch();}},
  "KeyQ":{"true_false_false" :(e)=>{FileUtils.getFile('UChrm',['user_chrome_files','_','.QT','QTranslate.exe']).launch();}},

handleEvent(e){if(AppConstants.platform !="macosx"){
 (this.handleEvent=e=>{this[e.code]?.[`${e.ctrlKey}_${e.altKey}_${e.shiftKey}`]?.(e);})(e);return;}
 (this.handleEvent=e=>{this[e.code]?.[`${e.metaKey}_${e.altKey}_${e.shiftKey}`]?.(e);})(e);},};
					   document.addEventListener("keydown",keydown,true);
this.destructor=()=>document.removeEventListener("keydown",keydown,true);
that.unloadlisteners.push("keyboardshortcuts");},
}).init(this);