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Top 23 JavaScript firefox-extension Projects
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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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There's an extension called floccus [1] that can sync bookmarks between numerous different browsers (including both Firefox/Gecko and Chromium/Blink based) and plug into a user-controlled NextCloud [2] or Linkwarden [3] instance running on a local homelab server.
However, I try to minimize the number of installed extensions to reduce my own browser fingerprint. As others have replied, Firefox sync works across most of today's popular downstream shadow-forks of Firefox (as in, forks that shadow the Firefox releases rather than truly forking the code). If you don't want to give Mozilla's enshittified corpse your email (I don't either), just use an email service that supports aliases to sign up for Firefox Sync... Which is in any case a good idea generally: no two of your important online accounts should point to the same email, even if behind the scenes the aliases are all routing emails back to you.
[1]: https://floccus.org/
[2]: https://nextcloud.com/
[3]: https://linkwarden.app/
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Project mention: A wonderful coincidence or an expected connection: why π² ≈ g | news.ycombinator.com | 2024-08-10
Here's a simplified revision of your comment:
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Totally unrelated to the content, but about the website itself.
The site completely breaks when I visit it. After some investigation, I found out that if I enable Stylus (a CSS injection extension) with any rules (even my global ones), the site becomes unusable. Since it's built using the React framework, it doesn't just glitch; it completely breaks.
After submitting a ticket and getting a quick response from the Stylus dev, it turns out that this website (and any site built with caseme.io) will throw an error and break if it detects any node injected into ``.
[1] https://github.com/openstyles/stylus/issues/1803
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Project mention: The Return of Digg, a Star of an Earlier Internet Era | news.ycombinator.com | 2025-03-05
It seems to be OK for me, but I am using https://redditenhancementsuite.com/
So many that makes a difference. I think it forces the old interface. Like my URL isn't even old.reddit, but all I see is the old interface. Or maybe I don't use subs with newer posts types that are not compatible with old?
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CodeRabbit
CodeRabbit: AI Code Reviews for Developers. Revolutionize your code reviews with AI. CodeRabbit offers PR summaries, code walkthroughs, 1-click suggestions, and AST-based analysis. Boost productivity and code quality across all major languages with each PR.
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Retire.js
scanner detecting the use of JavaScript libraries with known vulnerabilities. Can also generate an SBOM of the libraries it finds.
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FastForward
Don't waste your time with compliance. FastForward automatically skips annoying link shorteners.
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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 -
GhostText
👻 Use your text editor to write in your browser. Everything you type in the editor will be instantly updated in the browser (and vice versa).
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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 -
markdownload
A Firefox and Google Chrome extension to clip websites and download them into a readable markdown file.
I'll stick with using Markdownload (https://github.com/deathau/markdownload) when I need to do something like this.
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Project mention: I Ditched the Algorithm for RSS–and You Should Too | news.ycombinator.com | 2025-01-16
https://github.com/dimdenGD/OldTwitter
Works fine. Reverse chronological sorting with just who you follow.
For automated... apart from self host RSS options or nitter instance, neither of which I've tried...
For semi automated I have a manual but not too laborious google sheet:
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superpower-chatgpt
ChatGPT with superpowers! Search chat history, create folders, export all chats, pin messages, access thousands of community prompts, incognito mode, language and tone selection, and many more features
I'm very interested in checking something like this out for getting to grips with a local codebase of unfamiliar SQL and assorted scripts and reports.
I have a few tabs open that I haven't had a chance to try:
https://github.com/Mintplex-Labs/anything-llm
https://github.com/Bin-Huang/chatbox
https://github.com/saeedezzati/superpower-chatgpt
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web-archives
Browser extension for viewing archived and cached versions of web pages, available for Chrome, Edge and Safari
>Hopefully they are also making substantial donations to the Internet Archive, since they will be directing a lot of traffic into it and basically using their infrastructure as a feature on their main product
WebArchive link is hidden so deep in the "About the source" page that vast majority of Google users won't even know that it exists.
There is excellent browser extension called Web Archives[0] that hooks all major web archiving services e.g. Archive.is, Wayback Machine and others in one place.
[0] https://github.com/dessant/web-archives
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Project mention: Vercel ends open-source sponsorship program giving projects 24hr notice | news.ycombinator.com | 2024-06-14
Vercel sponsored my project (https://github.com/huhu/rust-search-extension) since 2020, and I also received their email yesterday. I sent a email try to ask the reason, and get no response yet.
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InfluxDB
InfluxDB high-performance time series database. Collect, organize, and act on massive volumes of high-resolution data to power real-time intelligent systems.
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 firefox-extension discussion
JavaScript firefox-extension related posts
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Retire.js – Scanner for JavaScript Libraries
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Phind 2: Reinventing AI search with visual answers and multi-step reasoning
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Ask HN: Are there web-of-trust style online communities?
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LibRedirect: Web extension to redirect websites to privacy-friendly front ends
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Ask HN: Which browser extensions could you not do without?
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13ft – A site similar to 12ft.io but is self hosted
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A wonderful coincidence or an expected connection: why π² ≈ g
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A note from our sponsor - CodeRabbit
coderabbit.ai | 25 Apr 2025
Index
What are some of the best open-source firefox-extension projects in JavaScript? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | chatGPTBox | 10,478 |
| 2 | buster | 8,415 |
| 3 | omni | 7,430 |
| 4 | floccus | 6,506 |
| 5 | stylus | 5,811 |
| 6 | notion-enhancer | 4,896 |
| 7 | Reddit-Enhancement-Suite | 4,266 |
| 8 | Retire.js | 3,815 |
| 9 | I-Still-Dont-Care-About-Cookies | 3,788 |
| 10 | FastForward | 3,683 |
| 11 | browser_extension | 3,462 |
| 12 | GhostText | 3,421 |
| 13 | privacybadger | 3,373 |
| 14 | markdownload | 3,221 |
| 15 | search-by-image | 2,574 |
| 16 | ipfs-companion | 2,118 |
| 17 | OldTwitter | 2,004 |
| 18 | better-onetab | 1,708 |
| 19 | superpower-chatgpt | 1,573 |
| 20 | read-aloud | 1,481 |
| 21 | ghostery-extension | 1,463 |
| 22 | web-archives | 1,301 |
| 23 | rust-search-extension | 1,253 |
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