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Top 23 userscript Open-Source Projects
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immersive-translate
沉浸式双语网页翻译扩展 , 支持输入框翻译， 鼠标悬停翻译， PDF, Epub, 字幕文件, TXT 文件翻译 - Immersive Dual Web Page Translation Extension
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KeepChatGPT
这是一款提高ChatGPT的数据安全能力和效率的插件。并且免费共享大量创新功能，如：自动刷新、保持活跃、数据安全、取消审计、克隆对话、言无不尽、净化页面、展示大屏、拦截跟踪、日新月异、明察秋毫等。让我们的AI体验无比安全、顺畅、丝滑、高效、简洁。
Project mention: ChatGPT Won't Let You Type Until Cloudflare Reads Your React State | news.ycombinator.com | 2026-03-29I was using KeepChatGPT[1] for a while back in 2023-2024, pre-Gemini-in-Google era, and I was fascinated as to how it was able to mask being a user without needing any API or help from the end user. I stopped using it after 2024 because 1) Gemini and 2) It breaks quite a lot. I did however, like how you had an option to push the AI panel to the right, if only Google even considers doing so.
[1]: https://github.com/xcanwin/keepchatgpt
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voice-over-translation
Небольшое расширение, которое добавляет закадровый перевод видео из YaBrowser в другие браузеры
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undiscord
Undiscord - Delete all messages in a Discord server / channel or DM (Easy and fast) Bulk delete
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Project mention: ScriptCat: open source Tampermonkey alternative with MV3 Support | news.ycombinator.com | 2025-11-15
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h5player
This software supports all audio and video websites, such as TikTok, YouTube, Bilibili, TED, Instagram, Twitter, etc. Features include: variable playback speed, screen capture, video download, custom settings, and extensions, etc., providing you with a pleasant online audio and video playback experience.
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Project mention: PWAsForFirefox – A tool to install, manage and use PWAs in Firefox | news.ycombinator.com | 2026-01-04
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musescore-downloader
⚠️ This repo has moved to https://github.com/LibreScore/dl-librescore ⚠️ | Download sheet music (MSCZ, PDF, MusicXML, MIDI, MP3, download individual parts as PDF) from musescore.com for free, no login or Musescore Pro required | 免登录、免 Musescore Pro，免费下载 musescore.com 上的曲谱
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control-panel-for-twitter
Browser extension which gives you more control over your Twitter timeline and adds missing features and UI improvements - for desktop and mobile
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Simple-YouTube-Age-Restriction-Bypass
A simple browser extension to bypass YouTube's age verification, disable content warnings and watch age restricted videos without having to sign in!
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vite-plugin-monkey
A vite plugin server and build your.user.js for userscript engine like Tampermonkey, Violentmonkey, Greasemonkey, ScriptCat
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Userscript-Plus
:monkey: Show current site all UserJS，The easier way to install UserJs for Tampermonkey. 显示当前网站的所有可用Tampermonkey脚本
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better-xcloud
Userscript to improve Xbox Cloud Gaming (xCloud) and Remote Play experiences on web browsers
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The hard fork was "Waterfox Classic", which just became unsustainable to maintain.
Rather than support for XPI (which is just the packaging for Firefox webextensions), the current version of Waterfox does still support bootstrapped extensions - in theory anyone can still write one, with access to all the privileged JavaScript APIs typically not accessible to MV2/MV3 webextensions.
It's not widely used though, there are two repos I'm aware of that take advantage of this:
https://github.com/xiaoxiaoflood/firefox-scripts/tree/master...
https://github.com/onemen/TabMixPlus/
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AdGuardExtra
AdGuard Extra is designed to solve complicated cases when regular ad blocking rules aren't enough.
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NOTE:
The open source projects on this list are ordered by number of github stars.
The number of mentions indicates repo mentiontions in the last 12 Months or
since we started tracking (Dec 2020).
userscript discussion
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HNRelevant – Add a "related" section to Hacker News
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Ereader Easy Swedish. Tool I Made for Myself to Learn a Language
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Tell HN: Immersive-translate plugin may expose you to XSS attacks
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Show HN: Paste2Download – No Login, No Ads, Download Videos Watermark Free
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A note from our sponsor - SaaSHub
www.saashub.com | 19 Jun 2026
Index
What are some of the best open-source userscript projects? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | Bilibili-Evolved | 29,574 |
| 2 | immersive-translate | 17,934 |
| 3 | KeepChatGPT | 14,885 |
| 4 | voice-over-translation | 6,953 |
| 5 | undiscord | 6,571 |
| 6 | userscripts | 4,584 |
| 7 | scriptcat | 4,540 |
| 8 | h5player | 3,619 |
| 9 | PWAsForFirefox | 3,029 |
| 10 | MALSync | 2,884 |
| 11 | musescore-downloader | 2,757 |
| 12 | chatgpt-exporter | 2,547 |
| 13 | control-panel-for-twitter | 2,540 |
| 14 | Simple-YouTube-Age-Restriction-Bypass | 2,411 |
| 15 | GitHub-userscripts | 1,998 |
| 16 | vite-plugin-monkey | 1,992 |
| 17 | Userscript-Plus | 1,923 |
| 18 | better-xcloud | 1,658 |
| 19 | maxurl | 1,553 |
| 20 | firefox-scripts | 1,338 |
| 21 | Stay | 1,273 |
| 22 | AdGuardExtra | 1,240 |
| 23 | ChromeXt | 1,095 |
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