GreaseMonkey

GreaseMonkey 油脂猴子，简称“油猴”，是一个浏览器插件，可以执行 JS 脚本。它们可以实现诸如自动化操作、改善用户界面、绕过限制等多种功能。

百度链接：https://baike.baidu.com/item/Greasemonkey/10727057

教程链接：

https://blog.csdn.net/qq_21561501/article/details/102696669

https://blog.csdn.net/jayandchuxu/article/details/79113755

https://blog.csdn.net/wujiayu31415/article/details/136191014

https://zhuanlan.zhihu.com/p/667584378

不同浏览器插件名称不一样，例如 Chrome ViolentMonkey 暴力猴

一个开源的用户脚本管理器，支持很多浏览器

Violentmonkey provides userscripts support for browsers. It works on browsers with WebExtensions support. It supports most scripts for Greasemonkey and Tampermonkey. Features: - Update automatically according to the meta data. - Scripts will be executed in order as shown in the list. - GM functions are supported. - Support import from and export to a zip file. - Sync to Dropbox, OneDrive, Google Drive and WebDAV!

这里提供了很多网站的功能（下载视频，复制粘贴等）

例如 https://greasyfork.org/en/scripts/438182-seatable-custom-style-online