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Top 23 JavaScript userscript Projects
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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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undiscord
Undiscord - Delete all messages in a Discord server / channel or DM (Easy and fast) Bulk delete
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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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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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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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SearchJumper
Yet another awesome browser extension for switching search engines, search everything (selection text / image / link / find in page) on any engine with a simple right click or a variety of menus and shortcuts. Build with React & Material-UI. (WIP).
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Project mention: Beachpatrol: Browser's End-User Automation CLI Hub | news.ycombinator.com | 2026-03-08
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Tape-Operator
Скрипт, превращающий IMDB, TMDB, Kinopoisk и Letterboxd в бесплатные онлайн - кинотеатры! 🎥
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IMDb-Scout-Mod
Auto search for movie/series on torrent, usenet, ddl, subtitles, streaming, predb and other sites. Adds links to IMDb pages from hundreds various sites. Adds movies/series to Radarr/Sonarr. Adds external ratings from Metacritic, Rotten Tomatoes, Letterboxd, Douban, Allocine. Media Server indicators for Plex, Jellyfin, Emby. Dark theme/style for Reference View. Adds/Removes to/from Trakt's watchlist. Removes ads
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Chat-DeMod
Tampermonkey/Greasemonkey script that hides the moderation results when communicating with Chat.
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uc.css.js
A dark indigo CSS theme for Firefox and a large collection of privileged scripts to add new buttons, menus, behaviors and other opinionated features. The theme is similar to other userChrome stylesheets, but it's intended for use with an autoconfig loader like fx-autoconfig, since it uses JavaScript to implement its more functional features.
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HandyImage
browser userscript (extension) which Shows just fullsize Image with hotkeys & without pop-ups on many image-hosting sites
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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).
JavaScript userscript discussion
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HNRelevant – Add a "related" section to Hacker News
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Show HN: Paste2Download – No Login, No Ads, Download Videos Watermark Free
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Ask HN: How do you use userscripts?
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Expand Everything, a userscript that clicks the 'show more' buttons
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Extension for zooming images on Twitter
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A note from our sponsor - SaaSHub
www.saashub.com | 12 Jun 2026
Index
What are some of the best open-source userscript projects in JavaScript? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | KeepChatGPT | 14,889 |
| 2 | undiscord | 6,562 |
| 3 | h5player | 3,616 |
| 4 | control-panel-for-twitter | 2,536 |
| 5 | Simple-YouTube-Age-Restriction-Bypass | 2,411 |
| 6 | GitHub-userscripts | 1,998 |
| 7 | maxurl | 1,547 |
| 8 | firefox-scripts | 1,338 |
| 9 | Stay | 1,273 |
| 10 | SearchJumper | 1,084 |
| 11 | beachpatrol | 921 |
| 12 | katakana-terminator | 859 |
| 13 | Tape-Operator | 811 |
| 14 | IMDb-Scout-Mod | 557 |
| 15 | GoodTwitter2 | 523 |
| 16 | Chat-DeMod | 479 |
| 17 | uc.css.js | 379 |
| 18 | HandyImage | 309 |
| 19 | mpiv | 235 |
| 20 | ChatGPT Auto Refresh | 207 |
| 21 | FirefoxCustomize | 197 |
| 22 | userscript-clean-twitter | 186 |
| 23 | instagram-dm-unsender | 185 |
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