-> nodejs
Install nodejs from https://nodejs.org/en/download/

-> Tampermonkey
use chrome or other browser then install https://tampermonkey.net/

node macOS_http_say.js

click https://semoz.github.io/bilibili_live_chat_reader/Tampermonkey/writer.js

to install js

or new js script and copy content

open live page
done!

安装nodejs环境，安装浏览器油猴插件

启动脚本：node macOS_http_say.js

浏览器点击 https://semoz.github.io/bilibili_live_chat_reader/Tampermonkey/writer.js

安装网页脚本

完成！