diff --git a/src/client/app/common/views/components/avatar.vue b/src/client/app/common/views/components/avatar.vue
index 0c6cd7048..dce594e70 100644
--- a/src/client/app/common/views/components/avatar.vue
+++ b/src/client/app/common/views/components/avatar.vue
@@ -1,14 +1,14 @@
 <template>
-	<span class="mk-avatar" :style="style" :class="{ cat }" :title="user | acct" v-if="disableLink && !disablePreview" v-user-preview="user.id" @click="onClick">
+	<span class="mk-avatar" :style="style" :class="{ cat }" :title="user | acct" v-if="disableLink && !disablePreview" v-user-preview="user.id" @click="onClick" v-once>
 		<span class="inner" :style="icon"></span>
 	</span>
-	<span class="mk-avatar" :style="style" :class="{ cat }" :title="user | acct" v-else-if="disableLink && disablePreview" @click="onClick">
+	<span class="mk-avatar" :style="style" :class="{ cat }" :title="user | acct" v-else-if="disableLink && disablePreview" @click="onClick" v-once>
 		<span class="inner" :style="icon"></span>
 	</span>
-	<router-link class="mk-avatar" :style="style" :class="{ cat }" :to="user | userPage" :title="user | acct" :target="target" v-else-if="!disableLink && !disablePreview" v-user-preview="user.id">
+	<router-link class="mk-avatar" :style="style" :class="{ cat }" :to="user | userPage" :title="user | acct" :target="target" v-else-if="!disableLink && !disablePreview" v-user-preview="user.id" v-once>
 		<span class="inner" :style="icon"></span>
 	</router-link>
-	<router-link class="mk-avatar" :style="style" :class="{ cat }" :to="user | userPage" :title="user | acct" :target="target" v-else-if="!disableLink && disablePreview">
+	<router-link class="mk-avatar" :style="style" :class="{ cat }" :to="user | userPage" :title="user | acct" :target="target" v-else-if="!disableLink && disablePreview" v-once>
 		<span class="inner" :style="icon"></span>
 	</router-link>
 </template>
diff --git a/src/client/app/common/views/components/misskey-flavored-markdown.vue b/src/client/app/common/views/components/misskey-flavored-markdown.vue
index 71d3a6766..09f2e287f 100644
--- a/src/client/app/common/views/components/misskey-flavored-markdown.vue
+++ b/src/client/app/common/views/components/misskey-flavored-markdown.vue
@@ -1,5 +1,5 @@
 <template>
-<mfm-core v-bind="$attrs" class="havbbuyv"/>
+<mfm-core v-bind="$attrs" class="havbbuyv" v-once/>
 </template>
 
 <script lang="ts">
diff --git a/src/client/app/desktop/views/components/note.vue b/src/client/app/desktop/views/components/note.vue
index 2e9a1f926..bc9ac8f0b 100644
--- a/src/client/app/desktop/views/components/note.vue
+++ b/src/client/app/desktop/views/components/note.vue
@@ -39,30 +39,30 @@
 					<mk-url-preview v-for="url in urls" :url="url" :key="url" :compact="compact"/>
 				</div>
 			</div>
-			<footer v-if="appearNote.deletedAt == null">
+			<footer v-if="appearNote.deletedAt == null" class="footer">
 				<span class="app" v-if="appearNote.app && narrow && $store.state.settings.showVia">via <b>{{ appearNote.app.name }}</b></span>
 				<mk-reactions-viewer :note="appearNote" ref="reactionsViewer"/>
-				<button class="replyButton" @click="reply()" :title="$t('reply')">
+				<button class="replyButton button" @click="reply()" :title="$t('reply')">
 					<template v-if="appearNote.reply"><fa icon="reply-all"/></template>
 					<template v-else><fa icon="reply"/></template>
 					<p class="count" v-if="appearNote.repliesCount > 0">{{ appearNote.repliesCount }}</p>
 				</button>
-				<button v-if="['public', 'home'].includes(appearNote.visibility)" class="renoteButton" @click="renote()" :title="$t('renote')">
+				<button v-if="['public', 'home'].includes(appearNote.visibility)" class="renoteButton button" @click="renote()" :title="$t('renote')">
 					<fa icon="retweet"/>
 					<p class="count" v-if="appearNote.renoteCount > 0">{{ appearNote.renoteCount }}</p>
 				</button>
-				<button v-else class="inhibitedButton">
+				<button v-else class="inhibitedButton button">
 					<fa icon="ban"/>
 				</button>
-				<button v-if="!isMyNote && appearNote.myReaction == null" class="reactionButton" @click="react()" ref="reactButton" :title="$t('add-reaction')">
+				<button v-if="!isMyNote && appearNote.myReaction == null" class="reactionButton button" @click="react()" ref="reactButton" :title="$t('add-reaction')">
 					<fa icon="plus"/>
 					<p class="count" v-if="Object.values(appearNote.reactionCounts).some(x => x)">{{ Object.values(appearNote.reactionCounts).reduce((a, c) => a + c, 0) }}</p>
 				</button>
-				<button v-if="!isMyNote && appearNote.myReaction != null" class="reactionButton reacted" @click="undoReact(appearNote)" ref="reactButton" :title="$t('undo-reaction')">
+				<button v-if="!isMyNote && appearNote.myReaction != null" class="reactionButton reacted button" @click="undoReact(appearNote)" ref="reactButton" :title="$t('undo-reaction')">
 					<fa icon="minus"/>
 					<p class="count" v-if="Object.values(appearNote.reactionCounts).some(x => x)">{{ Object.values(appearNote.reactionCounts).reduce((a, c) => a + c, 0) }}</p>
 				</button>
-				<button @click="menu()" ref="menuButton">
+				<button @click="menu()" ref="menuButton" class="button">
 					<fa icon="ellipsis-h"/>
 				</button>
 			</footer>
@@ -274,7 +274,7 @@ export default Vue.extend({
 							border dashed var(--lineWidth) var(--quoteBorder)
 							border-radius 8px
 
-			> footer
+			> .footer
 				> .app
 					display block
 					margin-top 0.5em
@@ -282,7 +282,7 @@ export default Vue.extend({
 					color var(--noteHeaderInfo)
 					font-size 0.8em
 
-				> button
+				> .button
 					margin 0 28px 0 0
 					padding 0 8px
 					line-height 32px
diff --git a/src/client/app/mobile/views/components/note.vue b/src/client/app/mobile/views/components/note.vue
index 5dff3546b..e1a7aeb93 100644
--- a/src/client/app/mobile/views/components/note.vue
+++ b/src/client/app/mobile/views/components/note.vue
@@ -36,26 +36,26 @@
 				</div>
 				<span class="app" v-if="appearNote.app && $store.state.settings.showVia">via <b>{{ appearNote.app.name }}</b></span>
 			</div>
-			<footer v-if="appearNote.deletedAt == null">
+			<footer v-if="appearNote.deletedAt == null" class="footer">
 				<mk-reactions-viewer :note="appearNote" ref="reactionsViewer"/>
-				<button @click="reply()">
+				<button @click="reply()" class="button">
 					<template v-if="appearNote.reply"><fa icon="reply-all"/></template>
 					<template v-else><fa icon="reply"/></template>
 					<p class="count" v-if="appearNote.repliesCount > 0">{{ appearNote.repliesCount }}</p>
 				</button>
-				<button v-if="['public', 'home'].includes(appearNote.visibility)" @click="renote()" title="Renote">
+				<button v-if="['public', 'home'].includes(appearNote.visibility)" @click="renote()" title="Renote" class="button">
 					<fa icon="retweet"/><p class="count" v-if="appearNote.renoteCount > 0">{{ appearNote.renoteCount }}</p>
 				</button>
-				<button v-else>
+				<button v-else class="button">
 					<fa icon="ban"/>
 				</button>
-				<button v-if="!isMyNote && appearNote.myReaction == null" class="reactionButton" @click="react()" ref="reactButton">
+				<button v-if="!isMyNote && appearNote.myReaction == null" class="button" @click="react()" ref="reactButton">
 					<fa icon="plus"/>
 				</button>
-				<button v-if="!isMyNote && appearNote.myReaction != null" class="reactionButton reacted" @click="undoReact(appearNote)" ref="reactButton">
+				<button v-if="!isMyNote && appearNote.myReaction != null" class="button reacted" @click="undoReact(appearNote)" ref="reactButton">
 					<fa icon="minus"/>
 				</button>
-				<button class="menu" @click="menu()" ref="menuButton">
+				<button class="button" @click="menu()" ref="menuButton">
 					<fa icon="ellipsis-h"/>
 				</button>
 			</footer>
@@ -237,8 +237,8 @@ export default Vue.extend({
 					font-size 12px
 					color #ccc
 
-			> footer
-				> button
+			> .footer
+				> .button
 					margin 0
 					padding 8px
 					background transparent