InfluxDB 3 OSS is now GA. Transform, enrich, and act on time series data directly in the database. Automate critical tasks and eliminate the need to move data externally. Download now. Learn more →
Top 23 JavaScript Webextension Projects
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Project mention: Floccus: Sync your bookmarks privately across browsers and devices | news.ycombinator.com | 2025-05-11
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SurveyJS
JavaScript Form Builder with No-Code UI & Built-In JSON Schema Editor. Add the SurveyJS white-label form builder to your JavaScript app (React/Angular/Vue3). Build complex JSON forms without coding. Fully customizable, works with any backend, perfect for data-heavy apps. Learn more.
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youtube
[top~1 open YouTube & Video browser-extension] - Enrich your experience & choice! 🧰180+ options & clever features 📌set+forget📌Longest-standing(been tough). Please join🧩us👨👩👧👧 ..⋮ {playback|content discovery|player|extra buttons|distractions|related videos|shorts|ads|quality|codec|full tab|full screen} (by code-charity)
Browser Extensions: As mentioned in my previous blogs when I worked on the ImprovedTube extension - I have recently been invested in learning more about browser extensions. The work I did for Le Git Graph, has taught me about the complexities of integrating with existing web applications (you have to know a lot about GitHub's interface in order to manipulate it!). Working on this extension made realize GitHub's dynamic nature requires me to carefully handle different page states and navigation patterns - and even then, there might be things that change and I'll have to update the code accordingly.
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browser_extension
A browser extension that redirects popular sites to alternative privacy friendly frontends
Project mention: Show HN: Seek Anywhere – A Chrome/Brave Extension | news.ycombinator.com | 2025-04-01 -
privacybadger
Privacy Badger is a browser extension that automatically learns to block invisible trackers.
Project mention: Escape the walled garden and algorithm black boxes with RSS feeds | news.ycombinator.com | 2025-01-19 -
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multi-account-containers
Firefox Multi-Account Containers lets you keep parts of your online life separated into color-coded tabs that preserve your privacy. Cookies are separated by container, allowing you to use the web with multiple identities or accounts simultaneously.
Project mention: Fixing a Bug in Google Chrome as a First-Time Contributor | news.ycombinator.com | 2024-08-26Interesting!
My negative experience with Firefox was with this 6 year old feature request relating to container colors. [0] They have hardcoded some colors & icons (6 or 8 I think?) as possible options. The problem is: If you have more than half a dozen of Gmail accounts that you want to containerize (e.g. for client work), it is really hard to keep them apart at first glance. Compare this to Google Chrome, where you can choose the browser color for each associated Gmail account individually.
I tried to manually extend & build it for myself, but the codebase relating to that was just a mindfuck to work on...
[0] https://github.com/mozilla/multi-account-containers/issues/1...
TL;DR: https://xkcd.com/619
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Civic Auth
Auth in Less Than 5 Minutes. Civic Auth comes with multiple SSO options, optional embedded wallets, and user management — all implemented with just a few lines of code. Start building today.
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privacy-redirect
A simple web extension that redirects Twitter, YouTube, Instagram & Google Maps requests to privacy friendly alternatives.
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YouTube fundamentally does not respect the time or attention of users - even if you pay for YouTube Premium.
The only way I can stomach YT at this point is with blocktube and unhook; I can disable parts of the interface, block channels and content individually or with regular expressions, and filter comments with regex - a necessity given how many scams are being run right now.
I dread the day they drop RSS feeds for channel updates.
https://github.com/amitbl/blocktube
https://unhook.app/
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Project mention: 13ft – A site similar to 12ft.io but is self hosted | news.ycombinator.com | 2024-08-19
I use this extension which has a decent UI: https://webextension.org/listing/useragent-switcher.html
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webscrapbook
A browser extension that captures web pages to local device or backend server for future retrieval, organization, annotation, and edit. This project inherits from legacy Firefox add-on ScrapBook X.
Project mention: Scrapbook – addon that captures web pages to local device or back end server | news.ycombinator.com | 2025-03-14 -
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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InfluxDB
InfluxDB – Built for High-Performance Time Series Workloads. InfluxDB 3 OSS is now GA. Transform, enrich, and act on time series data directly in the database. Automate critical tasks and eliminate the need to move data externally. Download now.
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 Webextension discussion
JavaScript Webextension related posts
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Recap Suite for working with PACER, the data system of American federal courts
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Blocklist for AI Music on YouTube
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Show HN: Chrome extention that links linear issues to the GitHub/Gitlab branch
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I Built a Browser Extension to Seamlessly Link GitLab Branches from Linear Issues! 🚀
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Manifest V2 phase-out begins
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Show HN: I made a CLI tool to create web extensions with no build configuration
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Ask HN: Nitter officially declared "over" today, alternatives?
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A note from our sponsor - InfluxDB
www.influxdata.com | 13 May 2025
Index
What are some of the best open-source Webextension projects in JavaScript? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | floccus | 6,556 |
| 2 | Traduzir-paginas-web | 5,077 |
| 3 | youtube | 3,754 |
| 4 | browser_extension | 3,482 |
| 5 | privacybadger | 3,389 |
| 6 | web-ext | 2,869 |
| 7 | multi-account-containers | 2,866 |
| 8 | ipfs-companion | 2,120 |
| 9 | privacy-redirect | 2,054 |
| 10 | keepassxc-browser | 1,898 |
| 11 | webextension-pixiv-toolkit | 1,556 |
| 12 | read-aloud | 1,492 |
| 13 | motrix-webextension | 1,382 |
| 14 | simple-tab-groups | 1,284 |
| 15 | maxurl | 1,247 |
| 16 | arcfox | 1,171 |
| 17 | blocktube | 1,110 |
| 18 | UserAgent-Switcher | 1,107 |
| 19 | shortkeys | 1,077 |
| 20 | webscrapbook | 999 |
| 21 | SearchJumper | 899 |
| 22 | sieve | 797 |
| 23 | ScratchAddons | 744 |
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