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Top 23 JavaScript firefox-webextension Projects
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markdownload
A Firefox and Google Chrome extension to clip websites and download them into a readable markdown file.
Project mention: Show HN: LLMFeeder – Browser extension to extract clean content for LLM context | news.ycombinator.com | 2025-06-03Nice work, I currently use Markdownload (https://github.com/deathau/markdownload) for this but will certainly give this a good shake out.
Kudos for making it a Firefox and not just Google extension as well.
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SurveyJS
SurveyJS: Build JSON-Driven Surveys and Forms with Full Data Control. Add the SurveyJS UI components to your JS app (React/Angular/Vue3). Securely collect and analyze data without sending it to 3rd-party servers. Fully customizable, works with any backend, and ideal for data-heavy apps. Learn more.
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BigSearch
Browser extension. Definitly more than a GET/POST sender. Handily use search engines via a Flexible Tool! UI has Vimium-like feature 🌐🔍 (Pure-client. No 3rd-party server needed) 大术专搜 既专又广 手敲几下 纵横去往
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It would be great if they restored the `Smart Bookmarks` feature they removed a number of years ago. Smart Bookmarks were fantastic. Add your favorite sites' RSS feeds to your bookmark toolbar and you'd have all the recent headlines from all your favorite sites at one click. Fortunately I wasn't the only one that appreciated this long neglected feature so someone created Livemarks (https://github.com/nt1m/livemarks/) that mostly replicated its functionality, but it's not quite the same as having native support for them.
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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.
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awesome-emoji-picker
Add-on/WebExtension that provides a modern emoji picker that you can use to find and copy/insert emoji into the active web page.
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winger
Window Manager: A Firefox web extension for switching windows, moving tabs between windows, and more
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website-dark-mode-switcher
This is a (Firefox) add-on (WebExtension) that lets you invert the website's color scheme by inverting/changing the prefers-color-scheme media feature of CSS.
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YTMySubs
Sets the Subscriptions page as your default homepage on YouTube by redirecting all requests at the browser level
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etag-stoppa
Minimalist extension for Firefox that removes ETag response headers unconditionally and without exceptions.
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zerodistraction
A firefox extension that blocks distracting websites to stay focused when you need to get things done
Project mention: Show HN: I built a Firefox/Zen extension to help you get shit done | news.ycombinator.com | 2025-11-26 -
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Straight-to-the-web
Straight to the web: Simplify the way Google shows you results, without the chaos.
Project mention: mkdir "No-google-AI-overviews" && man "google AI overviews" && rm "google AI overviews" | dev.to | 2025-05-21GITHUB
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Stream
Stream - Scalable APIs for Chat, Feeds, Moderation, & Video. Stream helps developers build engaging apps that scale to millions with performant and flexible Chat, Feeds, Moderation, and Video APIs and SDKs powered by a global edge network and enterprise-grade infrastructure.
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-webextension discussion
JavaScript firefox-webextension related posts
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Show HN: I built a Firefox/Zen extension to help you get shit done
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Show HN: ZeroDistraction – A Firefox extension that blocks distracting websites
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Show HN: A Firefox extension to avoid distractions
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2markdown – Transform Websites into Markdown
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Show HN: Zenfetch – Turn your saved browsing content into an AI second brain
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Copy webpage text, convert to Markdown
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Modulab (prev. SF-NTP-FF) - A Safari-inspired newtab page
- A note from our sponsor - Stream getstream.io | 22 Dec 2025
Index
What are some of the best open-source firefox-webextension projects in JavaScript? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | markdownload | 3,570 |
| 2 | simple-tab-groups | 1,339 |
| 3 | arcfox | 1,242 |
| 4 | BigSearch | 263 |
| 5 | livemarks | 253 |
| 6 | vivaldi-fox | 205 |
| 7 | ProtonDB-for-Steam | 189 |
| 8 | requestcontrol | 178 |
| 9 | time-based-themes | 139 |
| 10 | Custom-Scrollbar | 114 |
| 11 | awesome-emoji-picker | 107 |
| 12 | CleanLinks | 80 |
| 13 | winger | 74 |
| 14 | website-dark-mode-switcher | 69 |
| 15 | referer-mod | 53 |
| 16 | YTMySubs | 36 |
| 17 | quickcommands | 28 |
| 18 | etag-stoppa | 24 |
| 19 | zerodistraction | 15 |
| 20 | G-Meet-Auto-Join | 7 |
| 21 | WebResearcherJS | 6 |
| 22 | Straight-to-the-web | 5 |
| 23 | OriginalBirds | 4 |
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