diff --git a/packages/frontend/src/os.ts b/packages/frontend/src/os.ts
index 5e332533ef..88cbcd24e9 100644
--- a/packages/frontend/src/os.ts
+++ b/packages/frontend/src/os.ts
@@ -170,13 +170,33 @@ type EmitsExtractor<T> = {
 	[K in keyof T as K extends `onVnode${string}` ? never : K extends `on${infer E}` ? Uncapitalize<E> : K extends string ? never : K]: T[K];
 };
 
+type PopupOptions = {
+	/** @default false */
+	allowMultiple?: boolean;
+};
+
 export function popup<T extends Component>(
 	component: T,
 	props: ComponentProps<T>,
 	events: ComponentEmit<T> = {} as ComponentEmit<T>,
+	options: PopupOptions = {},
 ): { dispose: () => void } {
 	markRaw(component);
 
+	const _options: Required<PopupOptions> = Object.assign({
+		allowMultiple: false,
+	}, options);
+
+	if (
+		_options.allowMultiple === false &&
+		popups.value.some(popup => popup.component === component)
+	) {
+		if (_DEV_) console.warn('Popup already exists');
+		return {
+			dispose: () => { },
+		};
+	}
+
 	const id = ++popupIdCount;
 	const dispose = () => {
 		// このsetTimeoutが無いと挙動がおかしくなる(autocompleteが閉じなくなる)。Vueのバグ？
@@ -203,6 +223,8 @@ export function pageWindow(path: string) {
 		initialPath: path,
 	}, {
 		closed: () => dispose(),
+	}, {
+		allowMultiple: true,
 	});
 }
 
@@ -211,6 +233,8 @@ export function toast(message: string) {
 		message,
 	}, {
 		closed: () => dispose(),
+	}, {
+		allowMultiple: true,
 	});
 }
 
diff --git a/packages/frontend/src/scripts/hotkey.ts b/packages/frontend/src/scripts/hotkey.ts
index ff3cbe98ac..04fb235694 100644
--- a/packages/frontend/src/scripts/hotkey.ts
+++ b/packages/frontend/src/scripts/hotkey.ts
@@ -114,6 +114,7 @@ const matchPatterns = (ev: KeyboardEvent, action: Action) => {
 	const key = ev.key.toLowerCase();
 	return patterns.some(({ which, ctrl, shift, alt }) => {
 		if (
+			options.allowRepeat === false &&
 			latestHotkey != null &&
 			latestHotkey.which.includes(key) &&
 			latestHotkey.ctrl === ctrl &&