diff --git a/locales/index.d.ts b/locales/index.d.ts
index 880ee4bf56..4d86c69384 100644
--- a/locales/index.d.ts
+++ b/locales/index.d.ts
@@ -12525,6 +12525,14 @@ export interface Locale extends ILocale {
      * Failed to load note
      */
     "cannotLoadNote": string;
+    /**
+     * Please click [OK] to unsubscribe from announcement e-mails.
+     */
+    "clickToUnsubscribe": string;
+    /**
+     * There was a problem unsubscribing.
+     */
+    "unsubscribeError": string;
     "_flash": {
         /**
          * Flash Content Hidden
diff --git a/packages/frontend/src/components/SkNoteDetailed.vue b/packages/frontend/src/components/SkNoteDetailed.vue
index 357744da9c..43efa5bc11 100644
--- a/packages/frontend/src/components/SkNoteDetailed.vue
+++ b/packages/frontend/src/components/SkNoteDetailed.vue
@@ -79,7 +79,7 @@ Detailed view of a note in the Sharkey style. Used when opening a note onto its
 						<span v-if="appearNote.updatedAt" ref="menuVersionsButton" style="margin-left: 0.5em;" title="Edited" @mousedown="menuVersions()"><i class="ph-pencil-simple ph-bold ph-lg"></i></span>
 						<span v-if="appearNote.localOnly" style="margin-left: 0.5em;" :title="i18n.ts._visibility['disableFederation']"><i class="ti ti-rocket-off"></i></span>
 					</div>
-					<SkInstanceTicker v-if="showTicker" :host="appearNote.user.host" :instance="appearNote.user.instance"/>
+					<SkInstanceTicker v-if="showTicker" style="cursor: pointer;" :host="appearNote.user.host" :instance="appearNote.user.instance" @click.stop="showOnRemote(props.note)"/>
 				</div>
 			</div>
 		</header>
@@ -290,6 +290,7 @@ import SkNoteTranslation from '@/components/SkNoteTranslation.vue';
 import { getSelfNoteIds } from '@/utility/get-self-note-ids.js';
 import SkUrlPreviewGroup from '@/components/SkUrlPreviewGroup.vue';
 import MkNoteSub from '@/components/MkNoteSub.vue';
+import { showOnRemote } from '@/utility/show-on-remote.js';
 
 const props = withDefaults(defineProps<{
 	note: Misskey.entities.Note;
diff --git a/packages/frontend/src/components/SkNoteHeader.vue b/packages/frontend/src/components/SkNoteHeader.vue
index c9c3b5de08..6cf03ed473 100644
--- a/packages/frontend/src/components/SkNoteHeader.vue
+++ b/packages/frontend/src/components/SkNoteHeader.vue
@@ -40,7 +40,7 @@ Header for a note in the Sharkey style, displaying info such as username and cre
 			<span v-if="note.channel" style="margin-left: 0.5em;" :title="note.channel.name"><i class="ph-television ph-bold ph-lg"></i></span>
 		</div>
 		<div :class="$style.info">
-			<SkInstanceTicker v-if="showTicker" style="cursor: pointer;" :instance="note.user.instance" :host="note.user.host" @click.stop="showOnRemote()"/>
+			<SkInstanceTicker v-if="showTicker" style="cursor: pointer;" :instance="note.user.instance" :host="note.user.host" @click.stop="showOnRemote(props.note)"/>
 		</div>
 	</div>
 </header>
@@ -56,7 +56,7 @@ Header for a note in the Sharkey style, displaying info such as username and cre
 	<div v-if="note.user.badgeRoles" :class="$style.badgeRoles">
 		<img v-for="(role, i) in note.user.badgeRoles" :key="i" v-tooltip="role.name" :class="$style.badgeRole" :src="role.iconUrl ?? ''"/>
 	</div>
-	<SkInstanceTicker v-if="showTicker && !isMobile && prefer.s.showTickerOnReplies" style="cursor: pointer; max-height: 5px; top: 3px; position: relative; margin-top: 0 !important;" :instance="note.user.instance" :host="note.user.host" @click.stop="showOnRemote()"/>
+	<SkInstanceTicker v-if="showTicker && !isMobile && prefer.s.showTickerOnReplies" style="cursor: pointer; max-height: 5px; top: 3px; position: relative; margin-top: 0 !important;" :instance="note.user.instance" :host="note.user.host" @click.stop="showOnRemote(props.note)"/>
 	<div :class="$style.classicInfo">
 		<div v-if="mock">
 			<MkTime :time="note.createdAt" colored/>
@@ -89,6 +89,7 @@ import { prefer } from '@/preferences';
 import { useRouter } from '@/router';
 import { deviceKind } from '@/utility/device-kind';
 import SkInstanceTicker from '@/components/SkInstanceTicker.vue';
+import { showOnRemote } from '@/utility/show-on-remote.js';
 
 const props = defineProps<{
 	note: Misskey.entities.Note;
@@ -107,11 +108,6 @@ async function menuVersions(): Promise<void> {
 	popupMenu(menu, menuVersionsButton.value).then(focus).finally(cleanup);
 }
 
-function showOnRemote() {
-	if (props.note.url ?? props.note.uri === undefined) router.push(notePage(props.note));
-	else window.open(props.note.url ?? props.note.uri);
-}
-
 const mock = inject(DI.mock, false);
 </script>
 
diff --git a/packages/frontend/src/utility/get-note-menu.ts b/packages/frontend/src/utility/get-note-menu.ts
index 1698124623..9e699bb139 100644
--- a/packages/frontend/src/utility/get-note-menu.ts
+++ b/packages/frontend/src/utility/get-note-menu.ts
@@ -25,6 +25,7 @@ import { getAppearNote } from '@/utility/get-appear-note.js';
 import { genEmbedCode } from '@/utility/get-embed-code.js';
 import { prefer } from '@/preferences.js';
 import { getPluginHandlers } from '@/plugin.js';
+import { showOnRemote } from '@/utility/show-on-remote.js';
 
 export async function getNoteClipMenu(props: {
 	note: Misskey.entities.Note;
@@ -359,7 +360,7 @@ export function getNoteMenu(props: {
 				icon: 'ti ti-external-link',
 				text: i18n.ts.showOnRemote,
 				action: () => {
-					window.open(appearNote.url ?? appearNote.uri, '_blank', 'noopener');
+					showOnRemote(appearNote);
 				},
 			});
 		} else {
@@ -548,7 +549,7 @@ export function getNoteMenu(props: {
 				icon: 'ti ti-external-link',
 				text: i18n.ts.showOnRemote,
 				action: () => {
-					window.open(appearNote.url ?? appearNote.uri, '_blank', 'noopener');
+					showOnRemote(appearNote);
 				},
 			});
 		} else {
diff --git a/packages/frontend/src/utility/get-user-menu.ts b/packages/frontend/src/utility/get-user-menu.ts
index 1bad4b9d01..5003ddd7ae 100644
--- a/packages/frontend/src/utility/get-user-menu.ts
+++ b/packages/frontend/src/utility/get-user-menu.ts
@@ -20,6 +20,7 @@ import { mainRouter } from '@/router.js';
 import { genEmbedCode } from '@/utility/get-embed-code.js';
 import { prefer } from '@/preferences.js';
 import { getPluginHandlers } from '@/plugin.js';
+import { warningExternalWebsite } from '@/utility/warning-external-website.js';
 
 export function getUserMenu(user: Misskey.entities.UserDetailed, router: Router = mainRouter) {
 	const meId = $i ? $i.id : null;
@@ -211,7 +212,7 @@ export function getUserMenu(user: Misskey.entities.UserDetailed, router: Router
 			text: i18n.ts.showOnRemote,
 			action: () => {
 				if (user.url == null) return;
-				window.open(user.url, '_blank', 'noopener');
+				warningExternalWebsite(user.url);
 			},
 		});
 	} else {
diff --git a/packages/frontend/src/utility/show-on-remote.ts b/packages/frontend/src/utility/show-on-remote.ts
new file mode 100644
index 0000000000..121866af3a
--- /dev/null
+++ b/packages/frontend/src/utility/show-on-remote.ts
@@ -0,0 +1,23 @@
+/*
+ * SPDX-FileCopyrightText: bunnybeam and other Sharkey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { entities } from 'misskey-js';
+import { warningExternalWebsite } from './warning-external-website';
+import { useRouter } from '@/router';
+import { notePage } from '@/filters/note.js';
+
+const router = useRouter();
+
+/**
+ * Show a note on the remote instance, if possible. Otherwise, show the local note.
+ */
+export function showOnRemote(note: entities.Note) {
+	const remoteUrl = note.url ?? note.uri;
+	if (remoteUrl) {
+		warningExternalWebsite(remoteUrl);
+	} else {
+		router.push(notePage(note));
+	}
+}