diff --git a/scripts/Application.ts b/scripts/Application.ts
index 9576511c..4d569723 100644
--- a/scripts/Application.ts
+++ b/scripts/Application.ts
@@ -207,9 +207,6 @@ export class Application {
 	}
 
 	emit(eventName: string) {
-		document.dispatchEvent(new Event(eventName, {
-			"bubbles": true,
-			"cancelable": true
-		}))
+		document.dispatchEvent(new Event(eventName))
 	}
 }
\ No newline at end of file
diff --git a/scripts/SideBar.ts b/scripts/SideBar.ts
index 33dd4823..6b5ee703 100644
--- a/scripts/SideBar.ts
+++ b/scripts/SideBar.ts
@@ -1,4 +1,5 @@
 import { TouchController } from "./TouchController"
+import { Diff } from "./Diff"
 
 export class SideBar {
 	element: HTMLElement
@@ -20,11 +21,11 @@ export class SideBar {
 	}
 
 	show() {
-		this.element.classList.add("sidebar-visible")
+		Diff.mutations.queue(() => this.element.classList.add("sidebar-visible"))
 	}
 
 	hide() {
-		this.element.classList.remove("sidebar-visible")
+		Diff.mutations.queue(() => this.element.classList.remove("sidebar-visible"))
 	}
 
 	toggle() {
diff --git a/scripts/Utils.ts b/scripts/Utils.ts
index 9eeaef9f..8546907d 100644
--- a/scripts/Utils.ts
+++ b/scripts/Utils.ts
@@ -15,15 +15,7 @@ export function plural(count: number, singular: string): string {
 }
 
 export function canUseWebP(): boolean {
-    let canvas = document.createElement("canvas")
-
-    if(!!(canvas.getContext && canvas.getContext("2d"))) {
-        // WebP representation possible
-        return canvas.toDataURL("image/webp").indexOf("data:image/webp") === 0
-    } else {
-        // In very old browsers (IE 8) canvas is not supported
-        return false
-    }
+	return document.createElement("canvas").toDataURL("image/webp").indexOf("data:image/webp") === 0
 }
 
 export function swapElements(a: Node, b: Node) {