Userscripts

A userscript is a kind of lightweight and less privileged browser extension written in JavaScript used to modify webpages. Userscripts may use the special API, usually referred as GM_API, allowing them to bypass same-origin policy and store data in separate storage not accessible to web pages. The technology was initially introduced in the GreaseMonkey extension for Firefox web browser, and then spread to other browsers, sometimes built-in, like in Presto-based Opera, sometimes with help of extensions, like in Chromium-based browsers. The most famous catalogs of userscripts are GreasyFork and OpenUserJS.

GitHub: https://github.com/topics/userscript
Wikipedia: https://en.wikipedia.org/wiki/Userscript
Repo: https://github.com/greasemonkey/greasemonkey
Created by: Aaron Boodman
Released: March 28, 2005
Related Topics: webextension, javascript,
Aliases: userjs, greasemonkey, tampermonkey, violentmonkey,
Last updated: 2026-06-21 00:26:26 UTC
JSON Representation

https://github.com/qing90bing/qing_web-translate-script

翻译一些网站为中文，提升常用网站浏览体验，减少阅读压力，中文化插件：）

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Last synced: 15 May 2026

https://github.com/koyasi777/x-advanced-search-userscript

Adds a floating advanced search modal to X.com (formerly Twitter). Multilingual UI, live query sync, and persistent modal position.

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Last synced: 17 Jul 2025

https://github.com/ryu-dayo/chimo-chimo-loop

A surgical-grade HTML5 video toolkit for Safari & Chromium. Features: PiP, A-B Loop, Speed Control, and Lossless Screenshots. Perfect for guitarists, dancers, and learners.

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