YouTube LiveChat Flusher (Danmaku Chat)

Name: YouTube LiveChat Flusher (Danmaku Chat)
Rating: 4.8235 (34 reviews)
Author: _y_s

By: _y_s

Provides bullet chatting (danmaku) on YouTube Live, like niconico or bilibili.

Download

Install

Features & Capabilities

YouTube LiveChat Flusher brings danmaku-style bullet chats to YouTube Live streams, similar to Nico Nico and Bilibili. It displays messages without the native chat frame and supports translation, time-shift, and pause-and-move interactions. Under development, it may not work perfectly; if issues occur, refresh the page or switch to the mini player.

Configurable Options include Animation Duration, Font Size/Lines/Line Height, Font Family/Weight, Stroke Style, Chat Layer Opacity, Background Opacity, Max Width/Wrap, Display Limit, Simultaneous Messages behavior, Emoji Expression, Flow Direction, Hotkeys, visibility by user type, Banned Words, User CSS, Translation, and Time-shift Duration. The Control Panel is accessible from the Gear icon.

User Growth & Download Statistics

Add-on Communication Content Developer Tools

By:

_y_s

Daily users:

4,720 -2

Rating:

4.82

(34)

Version:

0.15.7 Last updated: 2026-07-08

Version code:

6344927

Creation date:

2021-10-10

Risk:

Permissions:

Host permissions:

*://www.youtube.com/*

Content scripts matches:

www.youtube.com

Size:

86.27KB

Email:

co*****@ysj.works

URLs:

Website

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-07-12

Compare stats and ranking:

Ranking

# 1,228

Other rankings

#192 in Appearance

#199 in Photos, Music & Videos ▼ 2

#6 in chat keyword 63

#25 in chatbotsplace keyword 22

#25 in chatgenie keyword 22

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Other platforms

YouTube LiveChat Flusher (Danmaku Chat) (v0.15.7)

80,000 4.28

(116)

For Developers

Monetize with App Pass Boost with Extension Booster

Contact the developer

Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.

Developed by:

_y_s

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/youtube-livechat-flusher/

Email:

co*****@ysj.works

Website:

https://github.com/ys-j/YoutubeLiveChatFlusher

Permission Change History

2026-06-27: Version 0.15.3 → 0.15.4

Add Permissions: notifications

2026-06-01: Version 0.14.9 → 0.15.0

Add Optional permissions: trialML

2026-03-29: Version 0.13.8 → 0.14.0

Remove Optional permissions: tabs

2025-05-29: Version 0.10.8 → 0.11.0

Add Host permissions: *://www.youtube.com/*

Add Optional permissions: tabs

User Reviews

Users widely praise YouTube LiveChat Flusher for smooth, non-choppy Danmaku-style chat, easy setup, high customization options, reliable performance, and translation support. However, multiple reviewers report stability issues after updates, including YouTube tab crashes or the extension stopping. There are also common requests for more fine-grained UI controls like spacing, line height, font size auto-resize, and text outline/shadow adjustments.

Pros

Smooth, non-choppy live chat flow.
High customization and control over appearance.
Easy to use / user-friendly.
Reliable performance and effective operation.
Translation support option.

Cons

Stability issues: causes YouTube tab crashes or the extension stops working after updates.
Requests for more fine-grained UI controls (spacing, line height, font size auto-resize, text outline/shadow).

Recent reviews

by Lu*****, 2026-06-12

YouTubeのタブがクラッシュするようになった。この拡張機能をOFFにしたらクラッシュしなくなったので、これが原因として間違いなし使いやすかったのに残念でならない

by ka*****, 2026-02-26

アップデート後から設定が保存されなくなった追記：ありがとうございます！完璧に動いています！

by Ol*****, 2026-02-25

View all user reviews ›

Is YouTube LiveChat Flusher (Danmaku Chat) Safe?

Risk impact

Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

YouTube LiveChat Flusher (Danmaku Chat) requires a few sensitive permissions. Exercise caution before installing.

Risk impact analysis details

Critical Request access to the following domains: youtube.com
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Risk likelihood

Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Add-ons Store, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.

YouTube LiveChat Flusher (Danmaku Chat) is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.

Risk likelihood analysis details

High This extension was recently updated in the past month. New updates may not be stable or safe.
High **** ********* *** *** **** ****** ********* ********** *** *** ** ****** ** *****
Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
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