diff --git a/src/components/event/ChannelMessage.tsx b/src/components/NotificationItem.tsx
similarity index 100%
rename from src/components/event/ChannelMessage.tsx
rename to src/components/NotificationItem.tsx
diff --git a/src/components/Post.tsx b/src/components/Post.tsx
index cf96c53..0f1b496 100644
--- a/src/components/Post.tsx
+++ b/src/components/Post.tsx
@@ -2,14 +2,15 @@ import { Component, JSX, Show, createSignal } from 'solid-js';
 
 import useDetectOverflow from '@/hooks/useDetectOverflow';
 import useFormatDate from '@/hooks/useFormatDate';
+import useProfile from '@/nostr/useProfile';
+import npubEncodeFallback from '@/utils/npubEncodeFallback';
 
 export type PostProps = {
-  author: JSX.Element;
+  authorPubkey: string;
   createdAt: Date;
   content: JSX.Element;
   actions?: JSX.Element;
   footer?: JSX.Element;
-  authorPictureUrl?: string;
   onShowProfile?: () => void;
   onShowEvent?: () => void;
 };
@@ -21,6 +22,10 @@ const Post: Component<PostProps> = (props) => {
   const [showOverflow, setShowOverflow] = createSignal();
   const createdAt = () => formatDate(props.createdAt);
 
+  const { profile: author } = useProfile(() => ({
+    pubkey: props.authorPubkey,
+  }));
+
   return (
     <div class="post flex flex-col">
       <div class="flex w-full gap-1">
@@ -32,7 +37,7 @@ const Post: Component<PostProps> = (props) => {
             props.onShowProfile?.();
           }}
         >
-          <Show when={props.authorPictureUrl} keyed>
+          <Show when={author()?.picture} keyed>
             {(url) => <img src={url} alt="icon" class="h-full w-full rounded object-cover" />}
           </Show>
         </button>
@@ -46,7 +51,22 @@ const Post: Component<PostProps> = (props) => {
                 props?.onShowProfile?.();
               }}
             >
-              {props.author}
+              <span class="author flex min-w-0 truncate hover:text-blue-500">
+                <Show when={(author()?.display_name?.length ?? 0) > 0}>
+                  <div class="author-name truncate pr-1 font-bold hover:underline">
+                    {author()?.display_name}
+                  </div>
+                </Show>
+                <div class="author-username truncate text-zinc-600">
+                  <Show
+                    when={author()?.name != null}
+                    fallback={`@${npubEncodeFallback(props.authorPubkey)}`}
+                  >
+                    @{author()?.name}
+                  </Show>
+                  {/* TODO <Match when={author()?.nip05 != null}>@{author()?.nip05}</Match> */}
+                </div>
+              </span>
             </button>
             <div class="created-at shrink-0">
               <button
diff --git a/src/components/column/Column.tsx b/src/components/column/Column.tsx
index b52e678..f8c57d3 100644
--- a/src/components/column/Column.tsx
+++ b/src/components/column/Column.tsx
@@ -76,7 +76,7 @@ const Column: Component<ColumnProps> = (props) => {
                   <div>ホームに戻る</div>
                 </button>
               </div>
-              <ul class="scrollbar flex h-full flex-col overflow-y-scroll scroll-smooth">
+              <ul class="scrollbar flex h-full flex-col overflow-y-scroll scroll-smooth pb-8">
                 <TimelineContentDisplay timelineContent={timeline} />
               </ul>
             </div>
diff --git a/src/components/event/Reaction.tsx b/src/components/event/Reaction.tsx
index 9bed217..c15e2ef 100644
--- a/src/components/event/Reaction.tsx
+++ b/src/components/event/Reaction.tsx
@@ -38,8 +38,8 @@ const Reaction: Component<ReactionProps> = (props) => {
     // if the reacted event is not found, it should be a removed event
     <Show when={!isRemoved() || shouldMuteEvent(props.event)}>
       <div class="flex gap-1 px-1 text-sm">
-        <div class="notification-icon flex place-items-center">
-          <Switch fallback={props.event.content}>
+        <div class="notification-icon flex max-w-[64px] place-items-center">
+          <Switch fallback={<span class="truncate">{props.event.content}</span>}>
             <Match when={props.event.content === '+'}>
               <span class="h-4 w-4 pt-[1px] text-rose-400">
                 <HeartSolid />
diff --git a/src/components/event/ZapReceipt.tsx b/src/components/event/ZapReceipt.tsx
new file mode 100644
index 0000000..3cc8a0a
--- /dev/null
+++ b/src/components/event/ZapReceipt.tsx
@@ -0,0 +1,45 @@
+import { Component, Show, createMemo } from 'solid-js';
+
+import { type Event as NostrEvent } from 'nostr-tools';
+
+import GeneralUserMentionDisplay from '@/components/event/textNote/GeneralUserMentionDisplay';
+import UserNameDisplay from '@/components/UserDisplayName';
+import useConfig from '@/core/useConfig';
+import { genericEvent } from '@/nostr/event';
+
+export type ZapReceiptProps = {
+  event: NostrEvent;
+};
+
+const ZapReceipt: Component<ZapReceiptProps> = (props) => {
+  const { shouldMuteEvent } = useConfig();
+
+  const event = createMemo(() => genericEvent(props.event));
+
+  const zapRequest = () => {
+    const description = event().findFirstTagByName('description');
+    if (description == null) return null;
+
+    try {
+      // TODO verify that this is event
+      return JSON.parse(description[1]) as NostrEvent;
+    } catch (err) {
+      console.error('failed to parse zap receipt', description);
+      return null;
+    }
+  };
+
+  const amount = () => {
+    return event().findFirstTagByName('amount');
+  };
+
+  return (
+    <Show when={!shouldMuteEvent(props.event)}>
+      ⚡
+      <UserNameDisplay pubkey={zapRequest().pubkey} />
+      <pre>{JSON.stringify(props.event, null, 2)}</pre>
+    </Show>
+  );
+};
+
+export default ZapReceipt;
diff --git a/src/components/event/textNote/TextNoteDisplay.tsx b/src/components/event/textNote/TextNoteDisplay.tsx
index 820bf02..e55d9c0 100644
--- a/src/components/event/textNote/TextNoteDisplay.tsx
+++ b/src/components/event/textNote/TextNoteDisplay.tsx
@@ -16,6 +16,7 @@ import EventDisplayById from '@/components/event/EventDisplayById';
 import ContentWarningDisplay from '@/components/event/textNote/ContentWarningDisplay';
 import GeneralUserMentionDisplay from '@/components/event/textNote/GeneralUserMentionDisplay';
 import TextNoteContentDisplay from '@/components/event/textNote/TextNoteContentDisplay';
+import EventDebugModal from '@/components/modal/EventDebugModal';
 import NotePostForm from '@/components/NotePostForm';
 import Post from '@/components/Post';
 import { useTimelineContext } from '@/components/timeline/TimelineContext';
@@ -23,12 +24,10 @@ import useConfig from '@/core/useConfig';
 import useModalState from '@/hooks/useModalState';
 import { textNote } from '@/nostr/event';
 import useCommands from '@/nostr/useCommands';
-import useProfile from '@/nostr/useProfile';
 import usePubkey from '@/nostr/usePubkey';
 import useReactions from '@/nostr/useReactions';
 import useReposts from '@/nostr/useReposts';
 import ensureNonNull from '@/utils/ensureNonNull';
-import npubEncodeFallback from '@/utils/npubEncodeFallback';
 import timeout from '@/utils/timeout';
 
 export type TextNoteDisplayProps = {
@@ -49,7 +48,7 @@ const EmojiReactions: Component<EmojiReactionsProps> = (props) => {
   const pubkey = usePubkey();
 
   return (
-    <div class="flex gap-2 py-1">
+    <div class="flex gap-2 overflow-x-auto py-1">
       <For each={[...props.reactionsGroupedByContent.entries()]}>
         {([content, events]) => {
           const isReactedByMeWithThisContent =
@@ -57,7 +56,7 @@ const EmojiReactions: Component<EmojiReactionsProps> = (props) => {
 
           return (
             <button
-              class="flex h-6 items-center rounded border px-1"
+              class="flex h-6 max-w-[128px] items-center rounded border px-1"
               classList={{
                 'text-zinc-400': !isReactedByMeWithThisContent,
                 'hover:bg-zinc-50': !isReactedByMeWithThisContent,
@@ -68,7 +67,10 @@ const EmojiReactions: Component<EmojiReactionsProps> = (props) => {
               type="button"
               onClick={() => props.onReaction(content)}
             >
-              <Show when={content === '+'} fallback={<span class="text-base">{content}</span>}>
+              <Show
+                when={content === '+'}
+                fallback={<span class="truncate text-base">{content}</span>}
+              >
                 <span class="inline-block h-3 w-3 pt-[1px] text-rose-400">
                   <HeartSolid />
                 </span>
@@ -93,6 +95,7 @@ const TextNoteDisplay: Component<TextNoteDisplayProps> = (props) => {
   const [reacted, setReacted] = createSignal(false);
   const [reposted, setReposted] = createSignal(false);
   const [showReplyForm, setShowReplyForm] = createSignal(false);
+  const [showEventDebug, setShowEventDebug] = createSignal(false);
   const closeReplyForm = () => setShowReplyForm(false);
 
   const event = createMemo(() => textNote(props.event));
@@ -100,10 +103,6 @@ const TextNoteDisplay: Component<TextNoteDisplayProps> = (props) => {
   const embedding = () => props.embedding ?? true;
   const actions = () => props.actions ?? true;
 
-  const { profile: author } = useProfile(() => ({
-    pubkey: props.event.pubkey,
-  }));
-
   const {
     reactions,
     reactionsGroupedByContent,
@@ -189,11 +188,9 @@ const TextNoteDisplay: Component<TextNoteDisplayProps> = (props) => {
       },
     },
     {
-      content: () => 'JSONとしてコピー',
+      content: () => 'JSONを確認',
       onSelect: () => {
-        navigator.clipboard
-          .writeText(JSON.stringify(props.event, null, 2))
-          .catch((err) => window.alert(err));
+        setShowEventDebug(true);
       },
     },
     {
@@ -292,25 +289,7 @@ const TextNoteDisplay: Component<TextNoteDisplayProps> = (props) => {
   return (
     <div class="nostr-textnote">
       <Post
-        author={
-          <span class="author flex min-w-0 truncate hover:text-blue-500">
-            <Show when={(author()?.display_name?.length ?? 0) > 0}>
-              <div class="author-name truncate pr-1 font-bold hover:underline">
-                {author()?.display_name}
-              </div>
-            </Show>
-            <div class="author-username truncate text-zinc-600">
-              <Show
-                when={author()?.name != null}
-                fallback={`@${npubEncodeFallback(event().pubkey)}`}
-              >
-                @{author()?.name}
-              </Show>
-              {/* TODO <Match when={author()?.nip05 != null}>@{author()?.nip05}</Match> */}
-            </div>
-          </span>
-        }
-        authorPictureUrl={author()?.picture}
+        authorPubkey={event().pubkey}
         createdAt={event().createdAtAsDate()}
         content={
           <div class="textnote-content">
@@ -458,6 +437,9 @@ const TextNoteDisplay: Component<TextNoteDisplayProps> = (props) => {
           timelineContext?.setTimeline({ type: 'Replies', event: props.event });
         }}
       />
+      <Show when={showEventDebug()}>
+        <EventDebugModal event={props.event} onClose={() => setShowEventDebug(false)} />
+      </Show>
     </div>
   );
 };
diff --git a/src/components/modal/EventDebugModal.tsx b/src/components/modal/EventDebugModal.tsx
new file mode 100644
index 0000000..e6feb51
--- /dev/null
+++ b/src/components/modal/EventDebugModal.tsx
@@ -0,0 +1,28 @@
+import { Component, For, createMemo } from 'solid-js';
+
+import { type Event as NostrEvent } from 'nostr-tools';
+
+import BasicModal from '@/components/modal/BasicModal';
+import Copy from '@/components/utils/Copy';
+
+export type EventDebugModalProps = {
+  event: NostrEvent;
+  onClose: () => void;
+};
+
+const EventDebugModal: Component<EventDebugModalProps> = (props) => {
+  const json = createMemo(() => JSON.stringify(props.event, null, 2));
+
+  return (
+    <BasicModal onClose={props.onClose}>
+      <div class="p-2">
+        <pre class="whitespace-pre-wrap break-all rounded border p-4 text-xs">{json()}</pre>
+        <div class="flex justify-end">
+          <Copy class="h-4 w-4" text={json()} />
+        </div>
+      </div>
+    </BasicModal>
+  );
+};
+
+export default EventDebugModal;
diff --git a/src/components/modal/ProfileDisplay.tsx b/src/components/modal/ProfileDisplay.tsx
index d6cef82..0cb8bd0 100644
--- a/src/components/modal/ProfileDisplay.tsx
+++ b/src/components/modal/ProfileDisplay.tsx
@@ -77,6 +77,7 @@ const ProfileDisplay: Component<ProfileDisplayProps> = (props) => {
     })),
   );
   const following = () => myFollowingPubkeys().includes(props.pubkey);
+  const refetchMyFollowing = () => myFollowingQuery.refetch();
 
   const { followingPubkeys: userFollowingPubkeys, query: userFollowingQuery } = useFollowings(
     () => ({ pubkey: props.pubkey }),
@@ -116,35 +117,58 @@ const ProfileDisplay: Component<ProfileDisplayProps> = (props) => {
     },
   });
 
-  const follow = () => {
+  const handlePromise =
+    <Params extends any[], T>(f: (...params: Params) => Promise<T>) =>
+    (onError: (err: any) => void) =>
+    (...params: Params) => {
+      f(...params).catch((err) => {
+        onError(err);
+      });
+    };
+
+  const follow = handlePromise(async () => {
     const p = myPubkey();
     if (p == null) return;
     if (!myFollowingQuery.isFetched) return;
 
+    await refetchMyFollowing();
     updateContactsMutation.mutate({
       relayUrls: config().relayUrls,
       pubkey: p,
       content: myFollowingQuery.data?.content ?? '',
       followingPubkeys: uniq([...myFollowingPubkeys(), props.pubkey]),
     });
-  };
+  })((err) => {
+    console.log('failed to follow', err);
+  });
 
-  const unfollow = () => {
+  const unfollow = handlePromise(async () => {
     const p = myPubkey();
     if (p == null) return;
     if (!myFollowingQuery.isFetched) return;
 
     if (!window.confirm('本当にフォロー解除しますか？')) return;
 
+    await refetchMyFollowing();
     updateContactsMutation.mutate({
       relayUrls: config().relayUrls,
       pubkey: p,
       content: myFollowingQuery.data?.content ?? '',
       followingPubkeys: myFollowingPubkeys().filter((k) => k !== props.pubkey),
     });
-  };
+  })((err) => {
+    console.log('failed to unfollow', err);
+  });
 
   const menu: MenuItem[] = [
+    /*
+    {
+      content: () => 'ユーザ宛に投稿',
+      onSelect: () => {
+        navigator.clipboard.writeText(npub()).catch((err) => window.alert(err));
+      },
+    },
+     */
     {
       content: () => 'IDをコピー',
       onSelect: () => {
diff --git a/src/components/modal/ProfileEdit.tsx b/src/components/modal/ProfileEdit.tsx
index a167600..fed58e1 100644
--- a/src/components/modal/ProfileEdit.tsx
+++ b/src/components/modal/ProfileEdit.tsx
@@ -76,6 +76,8 @@ const ProfileEdit: Component<ProfileEditProps> = (props) => {
   const loading = () => query.isLoading || mutation.isLoading;
   const disabled = () => loading();
 
+  setInterval(() => console.log(query.isLoading, mutation.isLoading), 1000);
+
   const otherProperties = () =>
     omit(profile(), [
       'picture',
diff --git a/src/components/timeline/Notification.tsx b/src/components/timeline/Notification.tsx
index fd8370b..b3bfbb7 100644
--- a/src/components/timeline/Notification.tsx
+++ b/src/components/timeline/Notification.tsx
@@ -6,6 +6,7 @@ import ColumnItem from '@/components/ColumnItem';
 import Reaction from '@/components/event/Reaction';
 import Repost from '@/components/event/Repost';
 import TextNote from '@/components/event/TextNote';
+import ZapReceipt from '@/components/event/ZapReceipt';
 import useConfig from '@/core/useConfig';
 
 export type NotificationProps = {
@@ -36,6 +37,13 @@ const Notification: Component<NotificationProps> = (props) => {
                 <Repost event={event} />
               </ColumnItem>
             </Match>
+            {/*
+            <Match when={event.kind === Kind.Zap}>
+              <ColumnItem>
+                <ZapReceipt event={event} />
+              </ColumnItem>
+            </Match>
+            */}
           </Switch>
         </Show>
       )}
diff --git a/src/components/utils/Copy.tsx b/src/components/utils/Copy.tsx
index 1b84e5b..d76aa8f 100644
--- a/src/components/utils/Copy.tsx
+++ b/src/components/utils/Copy.tsx
@@ -1,4 +1,4 @@
-import { createSignal, Show, type Component } from 'solid-js';
+import { createSignal, Show, type Component, type JSX } from 'solid-js';
 
 import ClipboardDocument from 'heroicons/24/outline/clipboard-document.svg';
 
diff --git a/src/hooks/useCommandBus.ts b/src/hooks/useCommandBus.ts
index fd7a654..8c4e214 100644
--- a/src/hooks/useCommandBus.ts
+++ b/src/hooks/useCommandBus.ts
@@ -7,7 +7,7 @@ type UseHandleCommandProps = {
 
 type CommandBase<T> = { command: T };
 
-export type OpenPostForm = CommandBase<'openPostForm'>;
+export type OpenPostForm = CommandBase<'openPostForm'> & { content?: string };
 export type ClosePostForm = CommandBase<'closePostForm'>;
 export type MoveToNextItem = CommandBase<'moveToNextItem'>;
 export type MoveToPrevItem = CommandBase<'moveToPrevItem'>;
diff --git a/src/hooks/useDetectOverflow.ts b/src/hooks/useDetectOverflow.ts
index 2b30d64..7aa1446 100644
--- a/src/hooks/useDetectOverflow.ts
+++ b/src/hooks/useDetectOverflow.ts
@@ -1,5 +1,8 @@
 import { createSignal, onMount } from 'solid-js';
 
+// TODO Find a better way to solve this. Firefox on Windows can cause 2px gap.
+const Offset = 2;
+
 const useDetectOverflow = () => {
   let elementRef: HTMLElement | undefined;
   const [overflow, setOverflow] = createSignal(false);
@@ -10,7 +13,7 @@ const useDetectOverflow = () => {
 
   onMount(() => {
     if (elementRef != null) {
-      setOverflow(elementRef.scrollHeight > elementRef.clientHeight);
+      setOverflow(elementRef.scrollHeight > elementRef.clientHeight + Offset);
     }
   });
 
diff --git a/src/nostr/useFollowings.ts b/src/nostr/useFollowings.ts
index 6f37359..dff100a 100644
--- a/src/nostr/useFollowings.ts
+++ b/src/nostr/useFollowings.ts
@@ -24,7 +24,7 @@ export type UseFollowings = {
   query: CreateQueryResult<NostrEvent | null>;
 };
 
-export const useFollowings = (propsProvider: () => UseFollowingsProps | null): UseFollowings => {
+const useFollowings = (propsProvider: () => UseFollowingsProps | null): UseFollowings => {
   const queryClient = useQueryClient();
   const props = createMemo(propsProvider);
   const genQueryKey = () => ['useFollowings', props()] as const;