diff --git a/zk/src/main/resources/web/js/zk/anima.ts b/zk/src/main/resources/web/js/zk/anima.ts
index 0829dfab364..ab3bad349ef 100644
--- a/zk/src/main/resources/web/js/zk/anima.ts
+++ b/zk/src/main/resources/web/js/zk/anima.ts
@@ -412,10 +412,8 @@ export namespace anima_global {
 					* fixed a bug of the finished animation for IE
 					* refix for ZK-568: Open combobox then select last item. reopen combobox then you should see selected item without scroll
 					*/
-					var zkie = zk.ie;
 					// ZK_3789: refine ZK-3695, fire down onRestore after the wrapper was removed
 					zWatch.fireDown('onRestore', wgt);
-					if (zkie == 10) zk(self.jq[0]).redoCSS();
 					zUtl.fireShown(wgt);
 				} else {
 					self.jq.hide();
diff --git a/zk/src/main/resources/web/js/zk/au.ts b/zk/src/main/resources/web/js/zk/au.ts
index 40536de3030..6993a5d603b 100644
--- a/zk/src/main/resources/web/js/zk/au.ts
+++ b/zk/src/main/resources/web/js/zk/au.ts
@@ -1654,9 +1654,7 @@ export namespace au_global {
 			export function download(url: string): void {
 				if (url) {
 					var ifr: HTMLIFrameElement = jq('#zk_download')[0] as HTMLIFrameElement,
-						ie = zk.ie,
 						sbu = zk.skipBfUnload;
-					if (ie) zk.skipBfUnload = true;
 
 					if (!ifr) {
 						ifr = document.createElement('iframe');
@@ -1667,12 +1665,6 @@ export namespace au_global {
 					}
 
 					ifr.src = url; //It is OK to reuse the same iframe
-
-					// Workaround for IE11: wait a second (not perfect) for iframe loading
-					if (ie === 11)
-						setTimeout(function () {
-							zk.skipBfUnload = sbu;
-						}, 1000);
 				}
 			}
 			/**
@@ -2183,10 +2175,7 @@ export namespace au_global {
 					// so we have to do the same as that code in Window.js
 					setTimeout(function () {
 						zk.afterAnimate(function () {
-							if (zk.ie9_)
-								wgt.focus(100);
-							else
-								wgt.focus(0); //wgt.focus() failed in FF
+							wgt.focus(0); //wgt.focus() failed in FF
 						}, -1);
 					});
 				}
diff --git a/zk/src/main/resources/web/js/zk/canvas/ext/excanvas.js b/zk/src/main/resources/web/js/zk/canvas/ext/excanvas.js
deleted file mode 100644
index c31bd0d9538..00000000000
--- a/zk/src/main/resources/web/js/zk/canvas/ext/excanvas.js
+++ /dev/null
@@ -1,925 +0,0 @@
-// Copyright 2006 Google Inc.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//   http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-
-// Known Issues:
-//
-// * Patterns are not implemented.
-// * Radial gradient are not implemented. The VML version of these look very
-//   different from the canvas one.
-// * Clipping paths are not implemented.
-// * Coordsize. The width and height attribute have higher priority than the
-//   width and height style values which isn't correct.
-// * Painting mode isn't implemented.
-// * Canvas width/height should is using content-box by default. IE in
-//   Quirks mode will draw the canvas using border-box. Either change your
-//   doctype to HTML5
-//   (http://www.whatwg.org/specs/web-apps/current-work/#the-doctype)
-//   or use Box Sizing Behavior from WebFX
-//   (http://webfx.eae.net/dhtml/boxsizing/boxsizing.html)
-// * Non uniform scaling does not correctly scale strokes.
-// * Optimize. There is always room for speed improvements.
-
-// Only add this code if we do not already have a canvas implementation
-if (!document.createElement('canvas').getContext) {
-
-	(function () {
-
-		// alias some functions to make (compiled) code shorter
-		var m = Math;
-		var mr = m.round;
-		var ms = m.sin;
-		var mc = m.cos;
-		var abs = m.abs;
-		var sqrt = m.sqrt;
-
-		// this is used for sub pixel precision
-		var Z = 10;
-		var Z2 = Z / 2;
-
-		/**
-		 * This funtion is assigned to the <canvas> elements as element.getContext().
-		 * @this {HTMLElement}
-		 * @return {CanvasRenderingContext2D_}
-		 */
-		function getContext() {
-			return this.context_ || (this.context_ = new CanvasRenderingContext2D_(this));
-		}
-
-		var slice = Array.prototype.slice;
-
-		/**
-		 * Binds a function to an object. The returned function will always use the
-		 * passed in {@code obj} as {@code this}.
-		 *
-		 * Example:
-		 *
-		 *   g = bind(f, obj, a, b)
-		 *   g(c, d) // will do f.call(obj, a, b, c, d)
-		 *
-		 * @param {Function} f The function to bind the object to
-		 * @param {Object} obj The object that should act as this when the function
-		 *     is called
-		 * @param {*} var_args Rest arguments that will be used as the initial
-		 *     arguments when the function is called
-		 * @return {Function} A new function that has bound this
-		 */
-		function bind(f, obj, var_args) {
-			var a = slice.call(arguments, 2);
-			return function () {
-				return f.apply(obj, a.concat(slice.call(arguments)));
-			};
-		}
-
-		var G_vmlCanvasManager_ = {
-			init: function (opt_doc) {
-				if (/MSIE/.test(navigator.userAgent) && !window.opera) {
-					var doc = opt_doc || document;
-					// Create a dummy element so that IE will allow canvas elements to be
-					// recognized.
-					doc.createElement('canvas');
-					//Tom Yeh, Potix, 20091230: not working if loaded dynamically
-					//        doc.attachEvent('onreadystatechange', bind(this.init_, this, doc));
-					jq(bind(this.init_, this, doc));
-				}
-			},
-
-			init_: function (doc) {
-				// create xmlns
-				if (!doc.namespaces['g_vml_']) {
-					doc.namespaces.add('g_vml_', 'urn:schemas-microsoft-com:vml',
-					'#default#VML');
-
-				}
-				if (!doc.namespaces['g_o_']) {
-					doc.namespaces.add('g_o_', 'urn:schemas-microsoft-com:office:office',
-					'#default#VML');
-				}
-
-				// Setup default CSS.  Only add one style sheet per document
-				if (!doc.styleSheets['ex_canvas_']) {
-					var ss = doc.createStyleSheet();
-					ss.owningElement.id = 'ex_canvas_';
-					ss.cssText = 'canvas{display:inline-block;overflow:hidden;'
-					// default size is 300x150 in Gecko and Opera
-					+ 'text-align:left;width:300px;height:150px}'
-					+ 'g_vml_\\:*{behavior:url(#default#VML)}'
-					+ 'g_o_\\:*{behavior:url(#default#VML)}';
-
-				}
-
-				// find all canvas elements
-				var els = doc.getElementsByTagName('canvas');
-				for (var i = 0; i < els.length; i++) {
-					this.initElement(els[i]);
-				}
-			},
-
-			/**
-			 * Public initializes a canvas element so that it can be used as canvas
-			 * element from now on. This is called automatically before the page is
-			 * loaded but if you are creating elements using createElement you need to
-			 * make sure this is called on the element.
-			 * @param {HTMLElement} el The canvas element to initialize.
-			 * @return {HTMLElement} the element that was created.
-			 */
-			initElement: function (el) {
-				if (!el.getContext) {
-
-					el.getContext = getContext;
-
-					// Remove fallback content. There is no way to hide text nodes so we
-					// just remove all childNodes. We could hide all elements and remove
-					// text nodes but who really cares about the fallback content.
-					el.innerHTML = '';
-
-					// do not use inline function because that will leak memory
-					el.attachEvent('onpropertychange', onPropertyChange);
-					el.attachEvent('onresize', onResize);
-
-					var attrs = el.attributes;
-					if (attrs.width && attrs.width.specified) {
-					// TODO: use runtimeStyle and coordsize
-					// el.getContext().setWidth_(attrs.width.nodeValue);
-						el.style.width = attrs.width.nodeValue + 'px';
-					} else {
-						el.width = el.clientWidth;
-					}
-					if (attrs.height && attrs.height.specified) {
-					// TODO: use runtimeStyle and coordsize
-					// el.getContext().setHeight_(attrs.height.nodeValue);
-						el.style.height = attrs.height.nodeValue + 'px';
-					} else {
-						el.height = el.clientHeight;
-					}
-					//el.getContext().setCoordsize_()
-				}
-				return el;
-			}
-		};
-
-		function onPropertyChange(e) {
-			var el = e.srcElement;
-
-			switch (e.propertyName) {
-				case 'width':
-					el.style.width = el.attributes.width.nodeValue + 'px';
-					el.getContext().clearRect();
-					break;
-				case 'height':
-					el.style.height = el.attributes.height.nodeValue + 'px';
-					el.getContext().clearRect();
-					break;
-			}
-		}
-
-		function onResize(e) {
-			var el = e.srcElement;
-			if (el.firstChild) {
-				el.firstChild.style.width = el.clientWidth + 'px';
-				el.firstChild.style.height = el.clientHeight + 'px';
-			}
-		}
-
-		G_vmlCanvasManager_.init();
-
-		// precompute "00" to "FF"
-		var dec2hex = [];
-		for (var i = 0; i < 16; i++) {
-			for (var j = 0; j < 16; j++) {
-				dec2hex[i * 16 + j] = i.toString(16) + j.toString(16);
-			}
-		}
-
-		function createMatrixIdentity() {
-			return [
-			[1, 0, 0],
-			[0, 1, 0],
-			[0, 0, 1]
-			];
-		}
-
-		function matrixMultiply(m1, m2) {
-			var result = createMatrixIdentity();
-
-			for (var x = 0; x < 3; x++) {
-				for (var y = 0; y < 3; y++) {
-					var sum = 0;
-
-					for (var z = 0; z < 3; z++) {
-						sum += m1[x][z] * m2[z][y];
-					}
-
-					result[x][y] = sum;
-				}
-			}
-			return result;
-		}
-
-		function copyState(o1, o2) {
-			o2.fillStyle = o1.fillStyle;
-			o2.lineCap = o1.lineCap;
-			o2.lineJoin = o1.lineJoin;
-			o2.lineWidth = o1.lineWidth;
-			o2.miterLimit = o1.miterLimit;
-			o2.shadowBlur = o1.shadowBlur;
-			o2.shadowColor = o1.shadowColor;
-			o2.shadowOffsetX = o1.shadowOffsetX;
-			o2.shadowOffsetY = o1.shadowOffsetY;
-			o2.strokeStyle = o1.strokeStyle;
-			o2.globalAlpha = o1.globalAlpha;
-			o2.arcScaleX_ = o1.arcScaleX_;
-			o2.arcScaleY_ = o1.arcScaleY_;
-			o2.lineScale_ = o1.lineScale_;
-		}
-
-		function processStyle(styleString) {
-			var str, alpha = 1;
-
-			styleString = String(styleString);
-			if (styleString.substring(0, 3) == 'rgb') {
-				var start = styleString.indexOf('(', 3);
-				var end = styleString.indexOf(')', start + 1);
-				var guts = styleString.substring(start + 1, end).split(',');
-
-				str = '#';
-				for (var i = 0; i < 3; i++) {
-					str += dec2hex[Number(guts[i])];
-				}
-
-				if (guts.length == 4 && styleString.substr(3, 1) == 'a') {
-					alpha = guts[3];
-				}
-			} else {
-				str = styleString;
-			}
-
-			return {color: str, alpha: alpha};
-		}
-
-		function processLineCap(lineCap) {
-			switch (lineCap) {
-				case 'butt':
-					return 'flat';
-				case 'round':
-					return 'round';
-				case 'square':
-				default:
-					return 'square';
-			}
-		}
-
-		/**
-		 * This class implements CanvasRenderingContext2D interface as described by
-		 * the WHATWG.
-		 * @param {HTMLElement} surfaceElement The element that the 2D context should
-		 * be associated with
-		 */
-		function CanvasRenderingContext2D_(surfaceElement) {
-			this.m_ = createMatrixIdentity();
-
-			this.mStack_ = [];
-			this.aStack_ = [];
-			this.currentPath_ = [];
-
-			// Canvas context properties
-			this.strokeStyle = '#000';
-			this.fillStyle = '#000';
-
-			this.lineWidth = 1;
-			this.lineJoin = 'miter';
-			this.lineCap = 'butt';
-			this.miterLimit = Z * 1;
-			this.globalAlpha = 1;
-			this.canvas = surfaceElement;
-
-			var el = surfaceElement.ownerDocument.createElement('div');
-			el.style.width = surfaceElement.clientWidth + 'px';
-			el.style.height = surfaceElement.clientHeight + 'px';
-			el.style.overflow = 'hidden';
-			el.style.position = 'absolute';
-			surfaceElement.appendChild(el);
-
-			this.element_ = el;
-			this.arcScaleX_ = 1;
-			this.arcScaleY_ = 1;
-			this.lineScale_ = 1;
-		}
-
-		var contextPrototype = CanvasRenderingContext2D_.prototype;
-		contextPrototype.clearRect = function () {
-			this.element_.innerHTML = '';
-		};
-
-		contextPrototype.beginPath = function () {
-			// TODO: Branch current matrix so that save/restore has no effect
-			//       as per safari docs.
-			this.currentPath_ = [];
-		};
-
-		contextPrototype.moveTo = function (aX, aY) {
-			var p = this.getCoords_(aX, aY);
-			this.currentPath_.push({type: 'moveTo', x: p.x, y: p.y});
-			this.currentX_ = p.x;
-			this.currentY_ = p.y;
-		};
-
-		contextPrototype.lineTo = function (aX, aY) {
-			var p = this.getCoords_(aX, aY);
-			this.currentPath_.push({type: 'lineTo', x: p.x, y: p.y});
-
-			this.currentX_ = p.x;
-			this.currentY_ = p.y;
-		};
-
-		contextPrototype.bezierCurveTo = function (aCP1x, aCP1y,
-													aCP2x, aCP2y,
-													aX, aY) {
-			var p = this.getCoords_(aX, aY);
-			var cp1 = this.getCoords_(aCP1x, aCP1y);
-			var cp2 = this.getCoords_(aCP2x, aCP2y);
-			bezierCurveTo(this, cp1, cp2, p);
-		};
-
-		// Helper function that takes the already fixed cordinates.
-		function bezierCurveTo(self, cp1, cp2, p) {
-			self.currentPath_.push({
-				type: 'bezierCurveTo',
-				cp1x: cp1.x,
-				cp1y: cp1.y,
-				cp2x: cp2.x,
-				cp2y: cp2.y,
-				x: p.x,
-				y: p.y
-			});
-			self.currentX_ = p.x;
-			self.currentY_ = p.y;
-		}
-
-		contextPrototype.quadraticCurveTo = function (aCPx, aCPy, aX, aY) {
-			// the following is lifted almost directly from
-			// http://developer.mozilla.org/en/docs/Canvas_tutorial:Drawing_shapes
-
-			var cp = this.getCoords_(aCPx, aCPy);
-			var p = this.getCoords_(aX, aY);
-
-			var cp1 = {
-				x: this.currentX_ + 2.0 / 3.0 * (cp.x - this.currentX_),
-				y: this.currentY_ + 2.0 / 3.0 * (cp.y - this.currentY_)
-			};
-			var cp2 = {
-				x: cp1.x + (p.x - this.currentX_) / 3.0,
-				y: cp1.y + (p.y - this.currentY_) / 3.0
-			};
-
-			bezierCurveTo(this, cp1, cp2, p);
-		};
-
-		contextPrototype.arc = function (aX, aY, aRadius,
-											aStartAngle, aEndAngle, aClockwise) {
-			aRadius *= Z;
-			var arcType = aClockwise ? 'at' : 'wa';
-
-			var xStart = aX + mc(aStartAngle) * aRadius - Z2;
-			var yStart = aY + ms(aStartAngle) * aRadius - Z2;
-
-			var xEnd = aX + mc(aEndAngle) * aRadius - Z2;
-			var yEnd = aY + ms(aEndAngle) * aRadius - Z2;
-
-			// IE won't render arches drawn counter clockwise if xStart == xEnd.
-			if (xStart == xEnd && !aClockwise) {
-				xStart += 0.125; // Offset xStart by 1/80 of a pixel. Use something
-				// that can be represented in binary
-			}
-
-			var p = this.getCoords_(aX, aY);
-			var pStart = this.getCoords_(xStart, yStart);
-			var pEnd = this.getCoords_(xEnd, yEnd);
-
-			this.currentPath_.push({type: arcType,
-									x: p.x,
-									y: p.y,
-									radius: aRadius,
-									xStart: pStart.x,
-									yStart: pStart.y,
-									xEnd: pEnd.x,
-									yEnd: pEnd.y});
-
-		};
-
-		contextPrototype.rect = function (aX, aY, aWidth, aHeight) {
-			this.moveTo(aX, aY);
-			this.lineTo(aX + aWidth, aY);
-			this.lineTo(aX + aWidth, aY + aHeight);
-			this.lineTo(aX, aY + aHeight);
-			this.closePath();
-		};
-
-		contextPrototype.strokeRect = function (aX, aY, aWidth, aHeight) {
-			var oldPath = this.currentPath_;
-			this.beginPath();
-
-			this.moveTo(aX, aY);
-			this.lineTo(aX + aWidth, aY);
-			this.lineTo(aX + aWidth, aY + aHeight);
-			this.lineTo(aX, aY + aHeight);
-			this.closePath();
-			this.stroke();
-
-			this.currentPath_ = oldPath;
-		};
-
-		contextPrototype.fillRect = function (aX, aY, aWidth, aHeight) {
-			var oldPath = this.currentPath_;
-			this.beginPath();
-
-			this.moveTo(aX, aY);
-			this.lineTo(aX + aWidth, aY);
-			this.lineTo(aX + aWidth, aY + aHeight);
-			this.lineTo(aX, aY + aHeight);
-			this.closePath();
-			this.fill();
-
-			this.currentPath_ = oldPath;
-		};
-
-		contextPrototype.createLinearGradient = function (aX0, aY0, aX1, aY1) {
-			var gradient = new CanvasGradient_('gradient');
-			gradient.x0_ = aX0;
-			gradient.y0_ = aY0;
-			gradient.x1_ = aX1;
-			gradient.y1_ = aY1;
-			return gradient;
-		};
-
-		contextPrototype.createRadialGradient = function (aX0, aY0, aR0,
-															aX1, aY1, aR1) {
-			var gradient = new CanvasGradient_('gradientradial');
-			gradient.x0_ = aX0;
-			gradient.y0_ = aY0;
-			gradient.r0_ = aR0;
-			gradient.x1_ = aX1;
-			gradient.y1_ = aY1;
-			gradient.r1_ = aR1;
-			return gradient;
-		};
-
-		contextPrototype.drawImage = function (image, var_args) {
-			var dx, dy, dw, dh, sx, sy, sw, sh;
-
-			// to find the original width we overide the width and height
-			var oldRuntimeWidth = image.runtimeStyle.width;
-			var oldRuntimeHeight = image.runtimeStyle.height;
-			image.runtimeStyle.width = 'auto';
-			image.runtimeStyle.height = 'auto';
-
-			// get the original size
-			var w = image.width;
-			var h = image.height;
-
-			// and remove overides
-			image.runtimeStyle.width = oldRuntimeWidth;
-			image.runtimeStyle.height = oldRuntimeHeight;
-
-			if (arguments.length == 3) {
-				dx = arguments[1];
-				dy = arguments[2];
-				sx = sy = 0;
-				sw = dw = w;
-				sh = dh = h;
-			} else if (arguments.length == 5) {
-				dx = arguments[1];
-				dy = arguments[2];
-				dw = arguments[3];
-				dh = arguments[4];
-				sx = sy = 0;
-				sw = w;
-				sh = h;
-			} else if (arguments.length == 9) {
-				sx = arguments[1];
-				sy = arguments[2];
-				sw = arguments[3];
-				sh = arguments[4];
-				dx = arguments[5];
-				dy = arguments[6];
-				dw = arguments[7];
-				dh = arguments[8];
-			} else {
-				throw Error('Invalid number of arguments');
-			}
-
-			var d = this.getCoords_(dx, dy);
-
-			var w2 = sw / 2;
-			var h2 = sh / 2;
-
-			var vmlStr = [];
-
-			var W = 10;
-			var H = 10;
-
-			// For some reason that I've now forgotten, using divs didn't work
-			vmlStr.push(' <g_vml_:group',
-			' coordsize="', Z * W, ',', Z * H, '"',
-			' coordorigin="0,0"' ,
-			' style="width:', W, 'px;height:', H, 'px;position:absolute;');
-
-			// If filters are necessary (rotation exists), create them
-			// filters are bog-slow, so only create them if abbsolutely necessary
-			// The following check doesn't account for skews (which don't exist
-			// in the canvas spec (yet) anyway.
-
-			if (this.m_[0][0] != 1 || this.m_[0][1]) {
-				var filter = [];
-
-				// Note the 12/21 reversal
-				filter.push('M11=', this.m_[0][0], ',',
-				'M12=', this.m_[1][0], ',',
-				'M21=', this.m_[0][1], ',',
-				'M22=', this.m_[1][1], ',',
-				'Dx=', mr(d.x / Z), ',',
-				'Dy=', mr(d.y / Z), '');
-
-				// Bounding box calculation (need to minimize displayed area so that
-				// filters don't waste time on unused pixels.
-				var max = d;
-				var c2 = this.getCoords_(dx + dw, dy);
-				var c3 = this.getCoords_(dx, dy + dh);
-				var c4 = this.getCoords_(dx + dw, dy + dh);
-
-				max.x = m.max(max.x, c2.x, c3.x, c4.x);
-				max.y = m.max(max.y, c2.y, c3.y, c4.y);
-
-				vmlStr.push('padding:0 ', mr(max.x / Z), 'px ', mr(max.y / Z),
-				'px 0;filter:progid:DXImageTransform.Microsoft.Matrix(',
-				filter.join(''), ", sizingmethod='clip');");
-			} else {
-				vmlStr.push('top:', mr(d.y / Z), 'px;left:', mr(d.x / Z), 'px;');
-			}
-
-			vmlStr.push(' ">' ,
-						'<g_vml_:image src="', image.src, '"',
-						' style="width:', Z * dw, 'px;',
-						' height:', Z * dh, 'px;"',
-						' cropleft="', sx / w, '"',
-						' croptop="', sy / h, '"',
-						' cropright="', (w - sx - sw) / w, '"',
-						' cropbottom="', (h - sy - sh) / h, '"',
-						' />',
-						'</g_vml_:group>');
-
-			this.element_.insertAdjacentHTML('BeforeEnd',
-											vmlStr.join(''));
-		};
-
-		contextPrototype.stroke = function (aFill) {
-			var lineStr = [];
-			var lineOpen = false;
-			var a = processStyle(aFill ? this.fillStyle : this.strokeStyle);
-			var color = a.color;
-			var opacity = a.alpha * this.globalAlpha;
-
-			var W = 10;
-			var H = 10;
-
-			lineStr.push('<g_vml_:shape',
-						' filled="', !!aFill, '"',
-						' style="position:absolute;width:', W, 'px;height:', H, 'px;"',
-						' coordorigin="0 0" coordsize="', Z * W, ' ', Z * H, '"',
-						' stroked="', !aFill, '"',
-						' path="');
-
-			var newSeq = false;
-			var min = {x: null, y: null};
-			var max = {x: null, y: null};
-
-			for (var i = 0; i < this.currentPath_.length; i++) {
-				var p = this.currentPath_[i];
-				var c;
-
-				switch (p.type) {
-					case 'moveTo':
-						c = p;
-						lineStr.push(' m ', mr(p.x), ',', mr(p.y));
-						break;
-					case 'lineTo':
-						lineStr.push(' l ', mr(p.x), ',', mr(p.y));
-						break;
-					case 'close':
-						lineStr.push(' x ');
-						p = null;
-						break;
-					case 'bezierCurveTo':
-						lineStr.push(' c ',
-									mr(p.cp1x), ',', mr(p.cp1y), ',',
-									mr(p.cp2x), ',', mr(p.cp2y), ',',
-									mr(p.x), ',', mr(p.y));
-						break;
-					case 'at':
-					case 'wa':
-						lineStr.push(' ', p.type, ' ',
-									mr(p.x - this.arcScaleX_ * p.radius), ',',
-									mr(p.y - this.arcScaleY_ * p.radius), ' ',
-									mr(p.x + this.arcScaleX_ * p.radius), ',',
-									mr(p.y + this.arcScaleY_ * p.radius), ' ',
-									mr(p.xStart), ',', mr(p.yStart), ' ',
-									mr(p.xEnd), ',', mr(p.yEnd));
-						break;
-				}
-
-
-				// TODO: Following is broken for curves due to
-				//       move to proper paths.
-
-				// Figure out dimensions so we can do gradient fills
-				// properly
-				if (p) {
-					if (min.x == null || p.x < min.x) {
-						min.x = p.x;
-					}
-					if (max.x == null || p.x > max.x) {
-						max.x = p.x;
-					}
-					if (min.y == null || p.y < min.y) {
-						min.y = p.y;
-					}
-					if (max.y == null || p.y > max.y) {
-						max.y = p.y;
-					}
-				}
-			}
-			lineStr.push(' ">');
-
-			if (!aFill) {
-				var lineWidth = this.lineScale_ * this.lineWidth;
-
-				// VML cannot correctly render a line if the width is less than 1px.
-				// In that case, we dilute the color to make the line look thinner.
-				if (lineWidth < 1) {
-					opacity *= lineWidth;
-				}
-
-				lineStr.push(
-					'<g_vml_:stroke',
-					' opacity="', opacity, '"',
-					' joinstyle="', this.lineJoin, '"',
-					' miterlimit="', this.miterLimit, '"',
-					' endcap="', processLineCap(this.lineCap), '"',
-					' weight="', lineWidth, 'px"',
-					' color="', color, '" />'
-				);
-			} else if (typeof this.fillStyle == 'object') {
-				var fillStyle = this.fillStyle;
-				var angle = 0;
-				var focus = {x: 0, y: 0};
-
-				// additional offset
-				var shift = 0;
-				// scale factor for offset
-				var expansion = 1;
-
-				if (fillStyle.type_ == 'gradient') {
-					var x0 = fillStyle.x0_ / this.arcScaleX_;
-					var y0 = fillStyle.y0_ / this.arcScaleY_;
-					var x1 = fillStyle.x1_ / this.arcScaleX_;
-					var y1 = fillStyle.y1_ / this.arcScaleY_;
-					var p0 = this.getCoords_(x0, y0);
-					var p1 = this.getCoords_(x1, y1);
-					var dx = p1.x - p0.x;
-					var dy = p1.y - p0.y;
-					angle = Math.atan2(dx, dy) * 180 / Math.PI;
-
-					// The angle should be a non-negative number.
-					if (angle < 0) {
-						angle += 360;
-					}
-
-					// Very small angles produce an unexpected result because they are
-					// converted to a scientific notation string.
-					if (angle < 1e-6) {
-						angle = 0;
-					}
-				} else {
-					var p0 = this.getCoords_(fillStyle.x0_, fillStyle.y0_);
-					var width = max.x - min.x;
-					var height = max.y - min.y;
-					focus = {
-						x: (p0.x - min.x) / width,
-						y: (p0.y - min.y) / height
-					};
-
-					width /= this.arcScaleX_ * Z;
-					height /= this.arcScaleY_ * Z;
-					var dimension = m.max(width, height);
-					shift = 2 * fillStyle.r0_ / dimension;
-					expansion = 2 * fillStyle.r1_ / dimension - shift;
-				}
-
-				// We need to sort the color stops in ascending order by offset,
-				// otherwise IE won't interpret it correctly.
-				var stops = fillStyle.colors_;
-				stops.sort(function (cs1, cs2) {
-					return cs1.offset - cs2.offset;
-				});
-
-				var length = stops.length;
-				var color1 = stops[0].color;
-				var color2 = stops[length - 1].color;
-				var opacity1 = stops[0].alpha * this.globalAlpha;
-				var opacity2 = stops[length - 1].alpha * this.globalAlpha;
-
-				var colors = [];
-				for (var i = 0; i < length; i++) {
-					var stop = stops[i];
-					colors.push(stop.offset * expansion + shift + ' ' + stop.color);
-				}
-
-				// When colors attribute is used, the meanings of opacity and o:opacity2
-				// are reversed.
-				lineStr.push('<g_vml_:fill type="', fillStyle.type_, '"',
-							' method="none" focus="100%"',
-							' color="', color1, '"',
-							' color2="', color2, '"',
-							' colors="', colors.join(','), '"',
-							' opacity="', opacity2, '"',
-							' g_o_:opacity2="', opacity1, '"',
-							' angle="', angle, '"',
-							' focusposition="', focus.x, ',', focus.y, '" />');
-			} else {
-				lineStr.push('<g_vml_:fill color="', color, '" opacity="', opacity,
-							'" />');
-			}
-
-			lineStr.push('</g_vml_:shape>');
-
-			this.element_.insertAdjacentHTML('beforeEnd', lineStr.join(''));
-		};
-
-		contextPrototype.fill = function () {
-			this.stroke(true);
-		};
-
-		contextPrototype.closePath = function () {
-			this.currentPath_.push({type: 'close'});
-		};
-
-		/**
-		   * @private
-		   */
-		contextPrototype.getCoords_ = function (aX, aY) {
-			var m = this.m_;
-			return {
-				x: Z * (aX * m[0][0] + aY * m[1][0] + m[2][0]) - Z2,
-				y: Z * (aX * m[0][1] + aY * m[1][1] + m[2][1]) - Z2
-			};
-		};
-
-		contextPrototype.save = function () {
-			var o = {};
-			copyState(this, o);
-			this.aStack_.push(o);
-			this.mStack_.push(this.m_);
-			this.m_ = matrixMultiply(createMatrixIdentity(), this.m_);
-		};
-
-		contextPrototype.restore = function () {
-			copyState(this.aStack_.pop(), this);
-			this.m_ = this.mStack_.pop();
-		};
-
-		function matrixIsFinite(m) {
-			for (var j = 0; j < 3; j++) {
-				for (var k = 0; k < 2; k++) {
-					if (!isFinite(m[j][k]) || isNaN(m[j][k])) {
-						return false;
-					}
-				}
-			}
-			return true;
-		}
-
-		function setM(ctx, m, updateLineScale) {
-			if (!matrixIsFinite(m)) {
-				return;
-			}
-			ctx.m_ = m;
-
-			if (updateLineScale) {
-				// Get the line scale.
-				// Determinant of this.m_ means how much the area is enlarged by the
-				// transformation. So its square root can be used as a scale factor
-				// for width.
-				var det = m[0][0] * m[1][1] - m[0][1] * m[1][0];
-				ctx.lineScale_ = sqrt(abs(det));
-			}
-		}
-
-		contextPrototype.translate = function (aX, aY) {
-			var m1 = [
-				[1, 0, 0],
-				[0, 1, 0],
-				[aX, aY, 1]
-			];
-
-			setM(this, matrixMultiply(m1, this.m_), false);
-		};
-
-		contextPrototype.rotate = function (aRot) {
-			var c = mc(aRot);
-			var s = ms(aRot);
-
-			var m1 = [
-				[c, s, 0],
-				[-s, c, 0],
-				[0, 0, 1]
-			];
-
-			setM(this, matrixMultiply(m1, this.m_), false);
-		};
-
-		contextPrototype.scale = function (aX, aY) {
-			this.arcScaleX_ *= aX;
-			this.arcScaleY_ *= aY;
-			var m1 = [
-				[aX, 0, 0],
-				[0, aY, 0],
-				[0, 0, 1]
-			];
-
-			setM(this, matrixMultiply(m1, this.m_), true);
-		};
-
-		contextPrototype.transform = function (m11, m12, m21, m22, dx, dy) {
-			var m1 = [
-				[m11, m12, 0],
-				[m21, m22, 0],
-				[dx, dy, 1]
-			];
-
-			setM(this, matrixMultiply(m1, this.m_), true);
-		};
-
-		contextPrototype.setTransform = function (m11, m12, m21, m22, dx, dy) {
-			var m = [
-				[m11, m12, 0],
-				[m21, m22, 0],
-				[dx, dy, 1]
-			];
-
-			setM(this, m, true);
-		};
-
-		/******** STUBS ********/
-		contextPrototype.clip = function () {
-		// TODO: Implement
-		};
-
-		contextPrototype.arcTo = function () {
-		// TODO: Implement
-		};
-
-		contextPrototype.createPattern = function () {
-			return new CanvasPattern_;
-		};
-
-		// Gradient / Pattern Stubs
-		function CanvasGradient_(aType) {
-			this.type_ = aType;
-			this.x0_ = 0;
-			this.y0_ = 0;
-			this.r0_ = 0;
-			this.x1_ = 0;
-			this.y1_ = 0;
-			this.r1_ = 0;
-			this.colors_ = [];
-		}
-
-		CanvasGradient_.prototype.addColorStop = function (aOffset, aColor) {
-			aColor = processStyle(aColor);
-			this.colors_.push({offset: aOffset,
-								color: aColor.color,
-								alpha: aColor.alpha});
-		};
-
-		function CanvasPattern_() {}
-
-		// set up externs
-		G_vmlCanvasManager = G_vmlCanvasManager_;
-		CanvasRenderingContext2D = CanvasRenderingContext2D_;
-		CanvasGradient = CanvasGradient_;
-		CanvasPattern = CanvasPattern_;
-
-	})();
-
-} // if
diff --git a/zk/src/main/resources/web/js/zk/canvas/zk.wpd b/zk/src/main/resources/web/js/zk/canvas/zk.wpd
index d450abcafa8..2874bb5b13f 100644
--- a/zk/src/main/resources/web/js/zk/canvas/zk.wpd
+++ b/zk/src/main/resources/web/js/zk/canvas/zk.wpd
@@ -14,5 +14,4 @@ Copyright (C) 2009 Potix Corporation. All Rights Reserved.
 <package name="zk.canvas" language="xul/html">
 	<script>//ExplorerCanvas, Copyright 2006 Google Inc.</script>
 	<script src="index.js" jsdoc="true"/>
-	<script src="ext/excanvas.js" browser="ie"/>
 </package>
diff --git a/zk/src/main/resources/web/js/zk/dom.ts b/zk/src/main/resources/web/js/zk/dom.ts
index c9f58dd6263..a79d96b9599 100644
--- a/zk/src/main/resources/web/js/zk/dom.ts
+++ b/zk/src/main/resources/web/js/zk/dom.ts
@@ -127,14 +127,10 @@ function _submit(this: HTMLElement): void {
 function _dissel(this: HTMLElement): void {
 	var $this = jq(this);
 	$this.css('user-select', 'none');
-	if (zk.ie11_ || zk.edge_legacy)
-		$this.on('selectstart', zk.$void);
 }
 function _ensel(this: HTMLElement): void {
 	var $this = jq(this);
 	$this.css('user-select', '');
-	if (zk.ie11_ || zk.edge_legacy)
-		$this.off('selectstart', zk.$void);
 }
 
 type ScrollIntoViewInfo = { oft: zk.Offset; h: number; w: number; el: HTMLElement } | undefined;
@@ -807,7 +803,7 @@ export class JQZK {
 	toStyleOffset(x: number, y: number): zk.Offset {
 		var el = this.jq[0],
 			oldx = el.style.left, oldy = el.style.top,
-			resetFirst = zk.webkit || zk.opera || zk.air || zk.ie;
+			resetFirst = zk.webkit || zk.opera;
 		//Opera:
 		//1)we have to reset left/top. Or, the second call position wrong
 		//test case: Tooltips and Popups
@@ -1766,12 +1762,10 @@ export class JQZK {
 
 	//Returns the minimal width to hold the given cell called by getChildMinSize_
 	static minWidth(el: Element | zk.Widget): number {
-		// B65-ZK-1526: IE11 required an extra pixel as IE9/IE10
-		return zk(el).offsetWidth() + (zk.ie11 ? 1 : 0);
+		return zk(el).offsetWidth();
 	}
 	//overriden in dom.js to fix the focus issue (losing caret...)
 	static fixInput(el: Element): void { //ZK-3237: including domie.js for IE 11 will have many side effects
-		if (zk.ie11_) return;
 		try {
 			var $n = zk(el), pos: zk.Offset;
 			if ($n.isInput()) {
@@ -2524,16 +2518,16 @@ Object.assign(jq, {
 	 * It is useful if you have a DOM element whose position is absolute.
 	 * Then, if you register the widget, the widget's zsync method will be called when some widget becomes visible, is added and so on.
 	 *
-	 * <p>For example, {@link zul.wnd.Window} uses DIV to simulate the shadow in IE,
+	 * <p>For example, {@link zul.wnd.Window} uses DIV to simulate the shadow in Firefox,
 	 * then it can register itself in {@link Widget#bind_} and then
 	 * synchronize the position and size of shadow (DIV) in zsync as follows.
 	 * ```ts
 	 * bind_: function () {
-	 *   if (zk.ie) jq.onzsync(this); //register
+	 *   if (zk.ff) jq.onzsync(this); //register
 	 * ...
 	 * },
 	 * unbind_: function () {
-	 *   if (zk.ie) jq.unzsync(this); //unregister
+	 *   if (zk.ff) jq.unzsync(this); //unregister
 	 * ...
 	 * },
 	 * zsync: function () {
diff --git a/zk/src/main/resources/web/js/zk/effect.ts b/zk/src/main/resources/web/js/zk/effect.ts
index 6e1a5a6d0b5..7cabbc58bf0 100644
--- a/zk/src/main/resources/web/js/zk/effect.ts
+++ b/zk/src/main/resources/web/js/zk/effect.ts
@@ -590,10 +590,9 @@ jq(function () {
 			_useSKU = false;
 		else {
 			_shallUse = !!(zk.webkit || zk.opera);
-			_useSKU = !_shallUse || zk.ie; // ZK-1748 should include all ie
+			_useSKU = !_shallUse;
 		}
-	} else if (_useSKU == null)
-		_useSKU = zk.ie; // ZK-1748 should include all ie
+	}
 
 	//if (_shallUse) { all browser should support autohide
 		var w2hide = function (name): void {
diff --git a/zk/src/main/resources/web/js/zk/mount.ts b/zk/src/main/resources/web/js/zk/mount.ts
index bb83fd2f06d..dbff553a988 100644
--- a/zk/src/main/resources/web/js/zk/mount.ts
+++ b/zk/src/main/resources/web/js/zk/mount.ts
@@ -682,26 +682,6 @@ jq(function () {
 			Widget.mimicMouseDown_(wgt, noFocusChange, evt.which); //wgt is null if mask
 
 		_doEvt(evt);
-
-		//Bug 2799334, 2635555 and 2807475: need to enforce a focus event (IE only)
-		//However, ZK-354: if target is upload, we can NOT focus to it. Thus, focusBackFix was introduced
-		if (old && zk.ie) { // Bug ZK-2795, IE11 still fails in this case.
-			var n = jq(old)[0];
-			if (n)
-				setTimeout(function () {
-					try {
-						var cf = zk.currentFocus;
-						if (cf && cf != old && !n.offsetWidth && !n.offsetHeight) {
-							zk.focusBackFix = true;
-							cf.focus();
-						}
-					} catch (e) {
-						zk.debugLog((e as Error).message ?? e);
-					} finally {
-						delete zk.focusBackFix;
-					}
-				});
-		}
 	}
 
 	/** @internal */
@@ -963,8 +943,7 @@ jq(function () {
 	}).on('unload', function () {
 		zk.unloading = true; //to disable error message
 
-		// B65-ZK-2051: Remove desktop if is IE.
-		if (zk.ie || !zk.rmDesktoping) {
+		if (!zk.rmDesktoping) {
 			rmDesktop();
 		}
 	});
@@ -1011,9 +990,7 @@ jq(function () {
 		zk.unloading = true; //FF3 aborts ajax before calling window.onunload
 
 		// B65-ZK-2051: Remove desktop if not IE.
-		if (!zk.ie) {
-			rmDesktop();
-		}
+		rmDesktop();
 		//Return nothing
 	};
 
diff --git a/zk/src/main/resources/web/js/zk/widget.ts b/zk/src/main/resources/web/js/zk/widget.ts
index e39f426b495..1aa5a68cced 100755
--- a/zk/src/main/resources/web/js/zk/widget.ts
+++ b/zk/src/main/resources/web/js/zk/widget.ts
@@ -342,8 +342,6 @@ function _rsFocus(cfi?: CurrentFocusInfo): void {
 
 function _listenFlex(wgt: zk.Widget & {_flexListened?: boolean}): void {
 	if (!wgt._flexListened) {
-		if (zk.ie) // not to use css flex in ie
-			wgt._cssflex = false;
 		var parent = wgt.parent,
 			cssFlexEnabled = wgt._cssflex && parent && ((parent instanceof zk.Page) || parent.getFlexContainer_() != null);
 		if (cssFlexEnabled)
@@ -408,9 +406,7 @@ export var DnD = class { //for easy overriding
 	static getDropTarget(evt: zk.Event, drag?: zk.Draggable): zk.Widget {
 		var wgt: zk.Widget | undefined;
 		// Firefox's bug -  https://bugzilla.mozilla.org/show_bug.cgi?id=1259357
-		if ((zk.ff && jq(evt.domTarget).css('overflow') !== 'visible') ||
-			// IE 9~11 and Edge may receive a wrong target when dragging with an Image.
-			((zk.ie || zk.edge_legacy) && jq.nodeName(evt.domTarget, 'img'))) {
+		if ((zk.ff && jq(evt.domTarget).css('overflow') !== 'visible')) {
 			var n = document.elementFromPoint(evt.domEvent!.clientX || 0, evt.domEvent!.clientY || 0);
 			if (n)
 				wgt = zk.$(n);
@@ -4157,12 +4153,7 @@ new zul.wnd.Window({
 	/** @internal */
 	getChildMinSize_(attr: zk.FlexOrient, wgt: zk.Widget): number { //'w' for width or 'h' for height
 		if (attr == 'w') {
-			// feature #ZK-314: zjq.minWidth function return extra 1px in IE9/10/11
-			var wd = zjq.minWidth(wgt);
-			if (zk.ie && zk.isLoaded('zul.wgt') && (wgt instanceof zul.wgt.Image)) {
-				wd = zk(wgt).offsetWidth();
-			}
-			return wd;
+			return zjq.minWidth(wgt);
 		} else {
 			return zk(wgt).offsetHeight();//See also bug ZK-483
 		}
diff --git a/zk/src/main/resources/web/js/zk/zk.ts b/zk/src/main/resources/web/js/zk/zk.ts
index 29d1a210c2b..e1d10f3cde8 100644
--- a/zk/src/main/resources/web/js/zk/zk.ts
+++ b/zk/src/main/resources/web/js/zk/zk.ts
@@ -456,22 +456,6 @@ declare namespace _zk {
 
 	/** The user agent of the browser. */
 	export let agent: string;
-	/**
-	 * The DOM API's version
-	 * if the browser is Internet Explorer, or null if not.
-	 * <p>Note: it is DOM API's version, not the browser version.
-	 * In other words, it depends on if the browser is running in a compatible mode.
-	 * For the browser's version, please use {@link iex} instead.
-	 */
-	export let ie: number | undefined;
-	/**
-	 * The browser's version as double (only the first two part of the version, such as 8)
-	 * if the browser is Internet Explorer, or null if not.
-	 * <p>Notice that this is the browser's version, which might not be the
-	 * version of DOM API. For DOM API's version, please use {@link ie} instead.
-	 * @since 5.0.7
-	 */
-	export let iex: number | string | false | undefined;
 	/**
 	 * The version as double (only the first two part of the version, such as 3.5)
 	 * if it is Gecko-based browsers,
@@ -496,8 +480,6 @@ declare namespace _zk {
 	 * The version as double (only the first two part of the version, such as 10.1) if it is Opera, or null if not.
 	 */
 	export let opera: string | number | false | undefined;
-	/** Whether it is Adobe AIR. */
-	export let air: boolean;
 	/** Whether it supports CSS3. */
 	export let css3: boolean;
 
@@ -1613,26 +1595,7 @@ if (_zk.ff) {
 	bodycls = 'opera';
 	_zk.vendor = 'O';
 } else {
-	_zk.iex = browser.msie && _ver(browser.version); //browser version
-		//zk.iex is the Browser Mode (aka., Compatibility View)
-		//while zk.ie is the Document Mode
-	if (!_zk.iex && ie11)
-		_zk.iex = ie11;
-
-	if (_zk.iex) {
-		_zk.ie = (document['documentMode'] || _zk.iex) as undefined | number;
-		if (_zk.ie) {
-			// zk.ien: the version n or later but less than 11
-			if (_zk.ie < 11 && _zk.ie >= 9) {
-				_zk.ie9 = _zk.ie >= 9;
-				_zk.ie10 = _zk.ie >= 10;
-			}
-			_zk['ie' + _zk.ie + '_'] = true;
-			_zk.css3 = _zk.ie >= 9;
-			bodycls = 'ie ie' + Math.floor(_zk.ie);
-		}
-		_zk.vendor = 'ms';
-	} else if (_zk.edge || _zk.edge_legacy) {
+	if (_zk.edge || _zk.edge_legacy) {
 		bodycls = 'edge';
 	} else {
 		if (_zk.chrome) {
@@ -1651,8 +1614,6 @@ if (_zk.mobile) {
 	else
 		bodycls += ' android';
 }
-if ((_zk.air = agent.includes('adobeair')) && _zk.webkit)
-	bodycls += ' air';
 
 if (bodycls)
 	jq(function () {
@@ -1662,61 +1623,58 @@ if (bodycls)
 _zk.vendor_ = _zk.vendor.toLowerCase();
 
 
-if (!_zk.ie && !_zk.edge_legacy) {
-	/** @class zk.Buffer
-	 * A string concatenation implementation to speed up the rendering performance
-	 * in the modern browsers, except IE or MS's Edge. The implementation is to
-	 * cheat the mold js of the ZK widgets' implementation that it assumed the
-	 * argument is an array type in the early ZK version.
-	 * <p>Note: if the default implementation breaks the backward compatibility,
-	 * please use the following script to overwrite the implementation as the same
-	 * as the early ZK version. For example,
-	 * ```ts
-	 * zk.Buffer = Array;
-	 * ```
-	 * @since 8.0.0
-	 */
-	class Buffer extends Array<string> {
-		out: string;
-		constructor() {
-			super();
-			this.out = '';
-		}
-		override push(...items: (string | null | undefined)[]): number {
-			for (const item of items) {
-				if (item != null) {
-					this.out += item;
-				}
+/** @class zk.Buffer
+ * A string concatenation implementation to speed up the rendering performance
+ * in the modern browsers, except IE or MS's Edge. The implementation is to
+ * cheat the mold js of the ZK widgets' implementation that it assumed the
+ * argument is an array type in the early ZK version.
+ * <p>Note: if the default implementation breaks the backward compatibility,
+ * please use the following script to overwrite the implementation as the same
+ * as the early ZK version. For example,
+ * ```ts
+ * zk.Buffer = Array;
+ * ```
+ * @since 8.0.0
+ */
+class Buffer extends Array<string> {
+	out: string;
+	constructor() {
+		super();
+		this.out = '';
+	}
+	override push(...items: (string | null | undefined)[]): number {
+		for (const item of items) {
+			if (item != null) {
+				this.out += item;
 			}
-			return this.length;
-		}
-		override join(separator?: string): string {
-			if (separator)
-				throw 'Wrong usage here! Please run the script `zk.Buffer = Array;` instead.';
-			return this.out;
 		}
-		override shift(): string | undefined {
-			throw 'Wrong usage here! Please run the script `zk.Buffer = Array;` instead.';
-		}
-		override unshift(...items: string[]): number {
-			throw 'Wrong usage here! Please run the script `zk.Buffer = Array;` instead.';
-		}
-		override pop(): string | undefined {
-			throw 'Wrong usage here! Please run the script `zk.Buffer = Array;` instead.';
-		}
-		override slice(start?: number | undefined, end?: number | undefined): string[] {
-			throw 'Wrong usage here! Please run the script `zk.Buffer = Array;` instead.';
-		}
-		override sort(compareFn?: ((a: string, b: string) => number) | undefined): this {
+		return this.length;
+	}
+	override join(separator?: string): string {
+		if (separator)
 			throw 'Wrong usage here! Please run the script `zk.Buffer = Array;` instead.';
-		}
+		return this.out;
+	}
+	override shift(): string | undefined {
+		throw 'Wrong usage here! Please run the script `zk.Buffer = Array;` instead.';
+	}
+	override unshift(...items: string[]): number {
+		throw 'Wrong usage here! Please run the script `zk.Buffer = Array;` instead.';
+	}
+	override pop(): string | undefined {
+		throw 'Wrong usage here! Please run the script `zk.Buffer = Array;` instead.';
+	}
+	override slice(start?: number | undefined, end?: number | undefined): string[] {
+		throw 'Wrong usage here! Please run the script `zk.Buffer = Array;` instead.';
+	}
+	override sort(compareFn?: ((a: string, b: string) => number) | undefined): this {
+		throw 'Wrong usage here! Please run the script `zk.Buffer = Array;` instead.';
 	}
-	// NOTE: the shape of the class `Buffer` shouldn't be leaked.
-	// Externally, `zk.Buffer` should always look like `ArrayConstructor`.
-	_zk.Buffer = Buffer as never as typeof Array<string>;
-} else {
-	_zk.Buffer = Array<string>;
 }
+// NOTE: the shape of the class `Buffer` shouldn't be leaked.
+// Externally, `zk.Buffer` should always look like `ArrayConstructor`.
+_zk.Buffer = Buffer as never as typeof Array<string>;
+
 
 // eslint-disable-next-line @typescript-eslint/no-explicit-any
 type PickFunction<T, K extends keyof T> = T[K] extends ((...args: any) => any) ? T[K] : never;
diff --git a/zul/src/main/resources/web/js/zul/box/Box.ts b/zul/src/main/resources/web/js/zul/box/Box.ts
index 9b96ac7b062..f41276c175a 100644
--- a/zul/src/main/resources/web/js/zul/box/Box.ts
+++ b/zul/src/main/resources/web/js/zul/box/Box.ts
@@ -541,13 +541,6 @@ export class Box extends zul.Widget {
 	override resetSize_(orient: zk.FlexOrient): void { //@Overrid zk.Widget#resetSize_, called when beforeSize
 		super.resetSize_(orient);
 
-		// B85-ZK-3516: remove size of frame
-		if (!zk.ie) {
-			var n = this.$n()!;
-			if (!n.scrollTop && !n.scrollLeft)
-				this.$n('frame')!.style[orient == 'w' ? 'width' : 'height'] = '';
-		}
-
 		var	vert = this.isVertical(),
 		k = -1,
 		szes = this._sizes;
@@ -701,7 +694,7 @@ export class Box extends zul.Widget {
 			let cwgt = vflexs.shift()!,
 				vsz = (cwgt._nvflex! * hgh / vflexsz) | 0, //cast to integer
 				//B50-3014664.zul offtop = cwgt.$n().offsetTop,
-				isz = vsz, // B50-3014664.zul vsz - ((zk.ie && offtop > 0) ? (offtop * 2) : 0);
+				isz = vsz,
 				chdex = cwgt.$n('chdex')!,
 				$chdex = zk(chdex),
 				minus = $chdex.padBorderHeight();
@@ -721,7 +714,7 @@ export class Box extends zul.Widget {
 		if (vflexs.length) {
 			let cwgt = vflexs.shift()!,
 				// B50-3014664.zul offtop = cwgt.$n().offsetTop,
-				isz = lastsz, // B50-3014664.zul - ((zk.ie && offtop > 0) ? (offtop * 2) : 0);
+				isz = lastsz,
 				chdex = cwgt.$n('chdex')!,
 				$chdex = zk(chdex),
 				minus = $chdex.padBorderHeight();
diff --git a/zul/src/main/resources/web/js/zul/box/Layout.ts b/zul/src/main/resources/web/js/zul/box/Layout.ts
index 1d072de241b..0d2a33fed91 100644
--- a/zul/src/main/resources/web/js/zul/box/Layout.ts
+++ b/zul/src/main/resources/web/js/zul/box/Layout.ts
@@ -515,10 +515,6 @@ export class Layout extends zul.Widget {
 						total += (w as HTMLElement).offsetWidth;
 				}
 
-				// IE9+ bug ZK-483
-				if (zk.ie11 && this._hflexsz)
-					total = Math.max(this._hflexsz, total);
-
 				n.style.width = jq.px0(total);
 			} else {
 				var max = 0;
@@ -528,10 +524,6 @@ export class Layout extends zul.Widget {
 						max = wd;
 				}
 
-				// IE9+ bug ZK-483
-				if (zk.ie11 && this._hflexsz)
-					max = Math.max(this._hflexsz, max);
-
 				n.style.width = jq.px0(max);
 			}
 		}
diff --git a/zul/src/main/resources/web/js/zul/db/Calendar.ts b/zul/src/main/resources/web/js/zul/db/Calendar.ts
index 575291f8170..27bd68d9511 100644
--- a/zul/src/main/resources/web/js/zul/db/Calendar.ts
+++ b/zul/src/main/resources/web/js/zul/db/Calendar.ts
@@ -151,8 +151,7 @@ export var Renderer = {
 			val = wgt.getTime(),
 			m = val.getMonth(),
 			y = val.getFullYear(),
-			// to avoid moment using the last day(according to local timezone) of the previous year in ie.
-			date = zk.ie ? new Date(y, m) : val._moment.toDate(),
+			date = val._moment.toDate(),
 			localeDateTimeFormat = new Intl.DateTimeFormat(localizedSymbols.LAN_TAG, {year: 'numeric'}),
 			displayYear = this._getDisplayYear(date, localizedSymbols, localeDateTimeFormat),
 			yofs = y - (y % 10 + 1),
diff --git a/zul/src/main/resources/web/js/zul/db/Datebox.ts b/zul/src/main/resources/web/js/zul/db/Datebox.ts
index a7f4a99f648..0186f11b014 100644
--- a/zul/src/main/resources/web/js/zul/db/Datebox.ts
+++ b/zul/src/main/resources/web/js/zul/db/Datebox.ts
@@ -1208,11 +1208,6 @@ export class CalendarPop extends zul.db.Calendar {
 			this.parent._tm.setVisible(val == 'day');
 		super._setView(val, force);
 
-		// ZK-2047: when sync shadow, the calendar popup should be above the pdf
-		if (zk.ie11) {
-			this.syncShadow();
-		}
-
 		return this;
 	}
 
diff --git a/zul/src/main/resources/web/js/zul/inp/ComboWidget.ts b/zul/src/main/resources/web/js/zul/inp/ComboWidget.ts
index 8452d79302e..0d1ba072fea 100644
--- a/zul/src/main/resources/web/js/zul/inp/ComboWidget.ts
+++ b/zul/src/main/resources/web/js/zul/inp/ComboWidget.ts
@@ -328,12 +328,7 @@ export class ComboWidget extends zul.inp.InputWidget<string> {
 		pp.style.position = 'absolute'; //just in case
 		pp.style.display = 'block';
 
-		var ppofs = this._getPopupSize(pp, pp2),
-			ie10up = zk.ie10_ || zk.ie11_;
-		if (ie10up) {
-			// B70-ZK-2742: arrange method fixsz execution order
-			this._fixsz(ppofs);//fix size
-		}
+		var ppofs = this._getPopupSize(pp, pp2);
 		// throw out
 		pp.style.visibility = 'hidden';
 		pp.style.left = '-10000px';
@@ -347,8 +342,6 @@ export class ComboWidget extends zul.inp.InputWidget<string> {
 		$pp.makeVParent();
 		zWatch.fireDown('onVParent', this);
 
-		if (ie10up)
-			pp.style.height = pp.style.width = 'auto';
 		this._fixsz(ppofs);
 
 		// throw in
diff --git a/zul/src/main/resources/web/js/zul/inp/InputWidget.ts b/zul/src/main/resources/web/js/zul/inp/InputWidget.ts
index 653111ed8aa..6a58e49b321 100644
--- a/zul/src/main/resources/web/js/zul/inp/InputWidget.ts
+++ b/zul/src/main/resources/web/js/zul/inp/InputWidget.ts
@@ -30,12 +30,6 @@ var _keyIgnorable = zk.opera ? function (code: number) {
 	} : function (code: number) {
 		return code >= 32;
 	},
-	_fixInput = zk.ie ? function<T> (wgt: InputWidget<T>) { //ZK-426; ZK-3237: IE 11 also have this problem
-		setTimeout(function () { //we have to delay since zk.currentFocus might not be ready
-			if (wgt == zk.currentFocus)
-				window.zjq.fixInput(wgt.getInputNode()!);
-		}, 0);
-	} : zk.$void,
 	windowX = 0,
 	windowY = 0;
 
@@ -242,8 +236,6 @@ export class InputWidget<ValueType = unknown> extends zul.Widget<HTMLInputElemen
 		if (o !== readonly || opts?.force) {
 			var inp = this.getInputNode();
 			if (inp) {
-				_fixInput(this);
-
 				var fnm = readonly ? 'addClass' as const : 'removeClass' as const;
 
 				inp.readOnly = readonly;
@@ -1095,9 +1087,6 @@ export class InputWidget<ValueType = unknown> extends zul.Widget<HTMLInputElemen
 	
 	/** @internal */
 	override focus_(timeout?: number): boolean {
-		// ZK-2020: should give timeout for ie11
-		if (zk.ie11_ && !timeout)
-			timeout = 0;
 		zk(this.getInputNode()).focus(timeout);
 		return true;
 	}
@@ -1129,16 +1118,8 @@ export class InputWidget<ValueType = unknown> extends zul.Widget<HTMLInputElemen
 			.domListen_(n, 'onBlur', 'doBlur_')
 			.domListen_(n, 'onSelect')
 			.domListen_(n, 'onMouseOver')
-			.domListen_(n, 'onMouseOut');
-		//prevent unexpected onInput bug in IE10 and IE11, see https://connect.microsoft.com/IE/feedback/details/816137
-		if (zk.ie10_ || zk.ie11_) {
-			var self = this;
-			setTimeout(function () {
-				self.domListen_(self.getInputNode()!, 'onInput', 'doInput_');
-			}, 100);
-		} else {
-			this.domListen_(n, 'onInput', 'doInput_');
-		}
+			.domListen_(n, 'onMouseOut')
+			.domListen_(n, 'onInput', 'doInput_');
 
 		if (zk.ios)
 			this.domListen_(n, 'onTouchStart', '_doTouch');
diff --git a/zul/src/main/resources/web/js/zul/menu/Menubar.ts b/zul/src/main/resources/web/js/zul/menu/Menubar.ts
index 8fbe94bfbb6..f8b6190bb98 100644
--- a/zul/src/main/resources/web/js/zul/menu/Menubar.ts
+++ b/zul/src/main/resources/web/js/zul/menu/Menubar.ts
@@ -208,9 +208,6 @@ export class Menubar extends zul.Widget {
 		for (var i = childrenLen; i--;)
 			totalWidth += jq(children[i]).outerWidth(true)!; //ZK-3095
 
-		if (zk.ie) // child width (text node) is not integer in IE
-			totalWidth += childrenLen;
-
 		if (totalWidth >= nodeWidth)
 			this._scrolling = true;
 		else {
diff --git a/zul/src/main/resources/web/js/zul/menu/Menupopup.ts b/zul/src/main/resources/web/js/zul/menu/Menupopup.ts
index 1cb0aadcf77..4e064b4996d 100644
--- a/zul/src/main/resources/web/js/zul/menu/Menupopup.ts
+++ b/zul/src/main/resources/web/js/zul/menu/Menupopup.ts
@@ -184,9 +184,6 @@ export class Menupopup extends zul.wgt.Popup {
 
 			if (left >= 0) {
 				n.style.left = jq.px0(left);
-				// ZK-2119: should sync again for ie
-				if (zk.ie)
-					this.onShow();
 			}
 		}
 	}
diff --git a/zul/src/main/resources/web/js/zul/mesh/Frozen.ts b/zul/src/main/resources/web/js/zul/mesh/Frozen.ts
index 29d8fad3dab..6264107f163 100644
--- a/zul/src/main/resources/web/js/zul/mesh/Frozen.ts
+++ b/zul/src/main/resources/web/js/zul/mesh/Frozen.ts
@@ -173,7 +173,7 @@ export class Frozen extends zul.Widget {
 				scrollbarWidth = jq.scrollbarWidth();
 			// ZK-2583: native IE bug, add 1px in scroll div's height for workaround
 			this.$n_().style.height = this.$n_('cave').style.height = this.$n_('right').style.height = scroll.style.height
-				= (scroll.firstChild as HTMLElement).style.height = jq.px0(zk.ie ? scrollbarWidth + 1 : scrollbarWidth);
+				= (scroll.firstChild as HTMLElement).style.height = jq.px0(scrollbarWidth);
 			p._currentLeft = 0;
 			this.domListen_(scroll, 'onScroll');
 
@@ -399,7 +399,7 @@ export class Frozen extends zul.Widget {
 
 				if (cnt-- <= 0) { //show
 					var wd = isVisible ?
-						(zk.ie ? Math.max(jq(n).width()!, 0) : n.offsetWidth) // Bug ZK-2690
+						n.offsetWidth // Bug ZK-2690
 						: 0;
 					// ZK-2071: nativebar behavior should be same as fakebar
 					// ZK-4762: cellWidth should update while scroll into view
@@ -414,7 +414,7 @@ export class Frozen extends zul.Widget {
 					}
 				} else if (force ||
 					// Bug ZK-2690
-					((zk.ie ? Math.max(jq(n).width()!, 0) : n.offsetWidth) != 0)) { //hide
+					(n.offsetWidth != 0)) { //hide
 					faker = jq('#' + n.id + '-hdfaker')[0];
 					//ZK-2776: consider faker's width first for layout consistent
 					if (faker.style.width && zk.parseInt(faker.style.width) > 1)
diff --git a/zul/src/main/resources/web/js/zul/mesh/HeadWidget.ts b/zul/src/main/resources/web/js/zul/mesh/HeadWidget.ts
index 4df68f56e14..b593bc216c5 100644
--- a/zul/src/main/resources/web/js/zul/mesh/HeadWidget.ts
+++ b/zul/src/main/resources/web/js/zul/mesh/HeadWidget.ts
@@ -169,15 +169,6 @@ export class HeadWidget extends zul.Widget<HTMLTableRowElement> {
 		super.unbind_(skipper, after, keepRod);
 	}
 
-	/** @internal */
-	override insertChildHTML_(child: zul.mesh.HeaderWidget, before?: zk.Widget, desktop?: zk.Desktop): void {
-		//ZK-2461: ie8 will take head-bar as one of columns, and equalize the width with other normal heads
-		if (zk.ie9 && this.$n('bar')) {
-			this.$n_('bar').style.display = 'none';
-		}
-		super.insertChildHTML_(child, before, desktop);
-	}
-
 	/** @internal */
 	override onChildAdded_(child: zul.mesh.HeaderWidget): void {
 		super.onChildAdded_(child);
diff --git a/zul/src/main/resources/web/js/zul/mesh/MeshWidget.ts b/zul/src/main/resources/web/js/zul/mesh/MeshWidget.ts
index debcddb89a7..d3faee63174 100644
--- a/zul/src/main/resources/web/js/zul/mesh/MeshWidget.ts
+++ b/zul/src/main/resources/web/js/zul/mesh/MeshWidget.ts
@@ -28,8 +28,6 @@ function _calcMinWd(wgt: MeshWidget): MeshWidth {
 	var wgtn = wgt.$n(),
 		ws = wgtn ? wgtn.style.whiteSpace : ''; //bug#3106514: sizedByContent with not visible columns
 	if (wgtn) {
-		if (zk.ie9)
-			wgt._wsbak = ws; // B50-ZK-432
 		wgtn.style.whiteSpace = 'nowrap'; // B50-3316030, B50-3346235: pre cause extra space
 	}
 	var eheadtblw: string | undefined,
@@ -137,7 +135,7 @@ function _calcMinWd(wgt: MeshWidget): MeshWidth {
 				wd = ftwd;
 			wds[i] = wd;
 			// Bug ZK-2772 don't plus one when frozen exists.
-			if (!wgt.frozen && (zk.ff! > 4 || zk.ie11 || zk.safari)) // firefox4 & IE9, 10, 11 & safari still cause break line in case B50-3147926 column 1
+			if (!wgt.frozen && (zk.ff! > 4 || zk.safari)) // firefox4 & IE9, 10, 11 & safari still cause break line in case B50-3147926 column 1
 				++wds[i];
 			width += wds[i]; // using wds[i] instead of wd for B50-3183172.zul
 			if (w)
@@ -154,7 +152,7 @@ function _calcMinWd(wgt: MeshWidget): MeshWidth {
 				wds[i] = wd;
 
 				// Bug ZK-2772 don't plus one when frozen exists.
-				if (!wgt.frozen && (zk.ff! > 4 || zk.ie11)) // firefox4 & IE9, 10, 11 still cause break line in case B50-3147926 column 1
+				if (!wgt.frozen && (zk.ff! > 4)) // firefox4 & IE9, 10, 11 still cause break line in case B50-3147926 column 1
 					++wds[i];
 				width += wds[i]; // using wds[i] instead of wd for B50-3183172.zul
 			}
@@ -965,7 +963,7 @@ export abstract class MeshWidget extends zul.Widget {
 		super.bind_(desktop, skipper, after);
 
 		this._bindDomNode();
-		if (this.frozen || zk.ie)
+		if (this.frozen)
 			this._cssflex = false; //force to use old flex
 		if (this._cssflex && this.isChildrenFlex()) {//css flex
 			this.ehdfaker!.style.display = 'none';
@@ -1363,11 +1361,6 @@ export abstract class MeshWidget extends zul.Widget {
 			if (_fixPageSize(this, rows))
 				return false; //need to reload with new page size
 
-		if (zk.ie9 && (this._wsbak !== undefined)) { // B50-ZK-432
-			this.$n_().style.whiteSpace = this._wsbak;
-			delete this._wsbak;
-		}
-
 		if (!this.desktop || !this._model || !rows || !rows.length)
 			return false;
 
diff --git a/zul/src/main/resources/web/js/zul/sel/SelectWidget.ts b/zul/src/main/resources/web/js/zul/sel/SelectWidget.ts
index 79517c74c52..8cd61f74e03 100644
--- a/zul/src/main/resources/web/js/zul/sel/SelectWidget.ts
+++ b/zul/src/main/resources/web/js/zul/sel/SelectWidget.ts
@@ -448,26 +448,8 @@ export abstract class SelectWidget extends zul.mesh.MeshWidget {
 
 	/** @internal */
 	override _beforeCalcSize(): void {
-		// Bug 279925
-		if (zk.ie9) {
-			var anchor = this.$n_('a');
-			this._oldCSS = anchor.style.display;
-			anchor.style.display = 'none';
-		}
-
 		this._calcHgh();
 	}
-
-	/** @internal */
-	override _afterCalcSize(): void {
-		// Bug 279925
-		if (zk.ie9) {
-			this.$n_('a').style.display = this._oldCSS!;
-			delete this._oldCSS;
-		}
-		super._afterCalcSize();
-	}
-
 	/**
 	 * @returns the index of the ItemWidget
 	 */
diff --git a/zul/src/main/resources/web/js/zul/sel/Treechildren.ts b/zul/src/main/resources/web/js/zul/sel/Treechildren.ts
index cc23a132790..2457041b83e 100644
--- a/zul/src/main/resources/web/js/zul/sel/Treechildren.ts
+++ b/zul/src/main/resources/web/js/zul/sel/Treechildren.ts
@@ -278,24 +278,8 @@ export class Treechildren extends zul.Widget {
 		else if (this.shallChildROD_(child))
 			(this.$class as typeof Treechildren)._unbindrod(child); //possible (e.g., Errorbox: jq().replaceWith)
 		var content = child.redrawHTML_(skipper, _trim_);
-		if (zk.ie11_ || zk.edge_legacy) { // Zk-3371: IE/Edge performance workaround (domie not apply to ie 11)
-			var jqelem = jq(n),
-				len = content.length,
-				elem = jqelem[0];
-			if (len > 1048576) {
-				var chunkSize = len / 2,
-					splitPos = content.lastIndexOf('</tr>', chunkSize),
-					chunk1 = content.substr(0, splitPos),
-					chunk2 = content.substr(splitPos);
-				elem.insertAdjacentHTML('afterend', chunk2);
-				elem.insertAdjacentHTML('afterend', chunk1);
-			} else {
-				elem.insertAdjacentHTML('afterend', content);
-			}
-			jqelem.remove();
-		} else {
-			jq(n).replaceWith(content);
-		}
+
+		jq(n).replaceWith(content);
 		child.bind(desktop, skipper);
 	}
 
diff --git a/zul/src/main/resources/web/js/zul/tab/Tabpanel.ts b/zul/src/main/resources/web/js/zul/tab/Tabpanel.ts
index bf82bbb4176..758de60e6dc 100644
--- a/zul/src/main/resources/web/js/zul/tab/Tabpanel.ts
+++ b/zul/src/main/resources/web/js/zul/tab/Tabpanel.ts
@@ -119,14 +119,14 @@ export class Tabpanel extends zul.ContainerWidget {
 				if (!vis) {
 					$pl.show();
 					// Bug ZK-1454: Scrollbar forgets its position when switching tabs in Tabbox
-					if (zk.ie9 || zk.webkit)
+					if (zk.webkit)
 						$pl.scrollTop(this._lastScrollTop!);
 					zUtl.fireShown(this);
 				}
 			} else if (vis) {
 				zWatch.fireDown('onHide', this);
 				// Bug ZK-1454: Scrollbar forgets its position when switching tabs in Tabbox
-				if (zk.ie9 || zk.webkit)
+				if (zk.webkit)
 					this._lastScrollTop = $pl.scrollTop();
 				$pl.hide();
 			}
diff --git a/zul/src/main/resources/web/js/zul/wgt/Cell.ts b/zul/src/main/resources/web/js/zul/wgt/Cell.ts
index 98c0020dca2..5bbaeb96e37 100644
--- a/zul/src/main/resources/web/js/zul/wgt/Cell.ts
+++ b/zul/src/main/resources/web/js/zul/wgt/Cell.ts
@@ -221,14 +221,6 @@ export class Cell extends zul.Widget<HTMLTableCellElement> {
 		return ' ' + zUtl.mapToString(m1!); // FIXME: m1 could be undefined
 	}
 
-	override setVisible(visible: boolean): this {
-		super.setVisible(visible);
-		// B65-ZK-2015: redoCSS in IE10 to make sure component will show when visible is true
-		if (zk.ie10_ && visible)
-			zk(this.$n()).redoCSS();
-		return this;
-	}
-
 	/** @internal */
 	override deferRedrawHTML_(out: string[]): void {
 		out.push('<td', this.domAttrs_({domClass: true}), ' class="z-renderdefer"></td>');
diff --git a/zul/src/main/resources/web/js/zul/wgt/Popup.ts b/zul/src/main/resources/web/js/zul/wgt/Popup.ts
index 902a1b34a56..478226bd435 100644
--- a/zul/src/main/resources/web/js/zul/wgt/Popup.ts
+++ b/zul/src/main/resources/web/js/zul/wgt/Popup.ts
@@ -352,15 +352,12 @@ export class Popup extends zul.Widget {
 
 		try {
 			//fix firefox, safari and ie issue
-			if ((zk.ie || zk.ff || zk.safari) && zk.currentFocus) {
+			if ((zk.ff || zk.safari) && zk.currentFocus) {
 				 // Bug ZK-2922, check ancestor first.
 				var n = zk.currentFocus.getInputNode ? zk.currentFocus.getInputNode() : zk.currentFocus.$n();
 				if (jq.nodeName(n!, 'input')) {
 					if ((zk.ff || zk.safari) && jq.isAncestor(this.$n(), n)) {
 						jq(n).blur(); // trigger a missing blur event.
-					} else if (zk.ie && document.activeElement !== n) {
-						//ZK-3244 popup miss focus on input on IE
-						zk(n).focus();
 					}
 				}
 			}
diff --git a/zul/src/main/resources/web/js/zul/wnd/Panel.ts b/zul/src/main/resources/web/js/zul/wnd/Panel.ts
index 8240f6f6808..a6b6b83cf96 100644
--- a/zul/src/main/resources/web/js/zul/wnd/Panel.ts
+++ b/zul/src/main/resources/web/js/zul/wnd/Panel.ts
@@ -1196,14 +1196,6 @@ export class Panel extends zul.Widget {
 			var node = this.$n(),
 				oldinfo: NodeInfo | undefined;
 
-			// ZK-1951, ZK-2045: Page becomes blank after detaching a modal window having an iframe loaded with PDF in IE > 9
-			// A workaround is to hide the iframe before remove
-			if (zk.ie11) {
-				var $jq = jq(this.$n_()).find('iframe');
-				if ($jq.length)
-					$jq.hide().remove();
-			}
-
 			zk(node).undoVParent(); //no need to fire onVParent in unbind_
 
 			var p = this.parent?.parent?.$n();
diff --git a/zul/src/main/resources/web/js/zul/wnd/Window.ts b/zul/src/main/resources/web/js/zul/wnd/Window.ts
index 4b19dbab2d5..534453c57fa 100644
--- a/zul/src/main/resources/web/js/zul/wnd/Window.ts
+++ b/zul/src/main/resources/web/js/zul/wnd/Window.ts
@@ -198,10 +198,7 @@ function _markModal(wgt: zul.wnd.Window): void {
 	setTimeout(function () {
 		zk.afterAnimate(function () {
 			if (!zUtl.isAncestor(wgt, zk.currentFocus)) {
-				if (zk.ie9_)
-					wgt.focus(100);
-				else
-					wgt.focus();
+				wgt.focus();
 			}
 		}, -1);
 	});
@@ -1436,7 +1433,7 @@ export class Window extends zul.ContainerWidget {
 		// at console. It should unbind ckeditor before remove it. Put here can works well on every browser.
 		this.unbindChildren_();
 		// ZK-2247: remove iframe to prevent load twice
-		if (zk.ie11 || zk.chrome) {
+		if (zk.chrome) {
 			const n = this.$n();
 			if (n) {
 				var $jq = jq(n).find('iframe');
@@ -1475,14 +1472,6 @@ export class Window extends zul.ContainerWidget {
 			this._mask.destroy();
 			this._mask = undefined;
 		}
-
-		// ZK-1951, ZK-2045: Page becomes blank after detaching a modal window having an iframe loaded with PDF in IE > 9
-		// A workaround is to hide the iframe before remove
-		if (zk.ie11) {
-			var $jq = jq(this.$n_()).find('iframe');
-			if ($jq.length)
-				$jq.hide().remove();
-		}
 		zk(node).undoVParent(); //no need to fire onVParent in unbind_
 		zWatch.unlisten({
 			onFloatUp: this,