SaaSHub helps you find the best software and product alternatives Learn more →
Top 23 JavaScript manifest-v3 Projects
-
YouTube_Summary_with_ChatGPT
YouTube Summary with ChatGPT is a simple Chrome Extension (manifest v3) that allows you to get both YouTube video transcripts and summary of the video with OpenAI's ChatGPT AI technology.
-
AppSignal
Monitoring that respects your time & budget. APM, error tracking, and dashboards for modern web apps. Ten-minute setup, transparent flat pricing, and support from engineers who actually use the product.
-
keyFinder
Passive API key and secret discovery browser extension for Chrome and Firefox. 80+ detection patterns, zero config.
-
-
ocr-it
Chrome extension: pin a screen region once, then hotkey your way through a paginated document. OCR runs 100% offline via bundled Tesseract.
Project mention: OCR It – pull text out of un-copyable documents for your LLM | news.ycombinator.com | 2026-08-23https://chromewebstore.google.com/detail/ocr-it/pekiamimgjbj...
We are still waiting for the firefox extension to be approved, i will post it here whenever we hear something. In the meanwhile it can be tested with the zip file here https://github.com/thiagotigaz/ocr-it/releases or by building manually.
-
search-bookmarks-history-and-tabs
Browser extension to search bookmarks, history and tabs. Supports tagging and fuzzy search.
I feel you, I also prefer precise search in most cases.
In a private bookmark extension project, I explictly supported both and made it easy to switch them any time: https://github.com/Fannon/search-bookmarks-history-and-tabs
-
chrome-extension-webpack
Get started with Chrome extensions development using webpack, TypeScript, Sass, and more.
-
bookmarks-organizer
With the Bookmarks Organizer it's easy to put order in your bookmarks. The Bookmarks Organizer finds no longer working bookmarks, redirects, duplicates and more!
-
SaaSHub
SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives
-
GemType
Free, open-source Grammarly alternative for Chrome & Safari — AI grammar checker and text rewriter for any website, powered by your own free Google Gemini API key. No account, no tracking, no subscription.
Project mention: Open-source Grammarly alternatives in 2026 — and why I built another one | dev.to | 2026-07-14 -
-
-
share-to-mastodon
Browser extension for sharing links and tabs to Mastodon (and other Fediverse platforms)
-
GitSyncMarks
Browser extension for bidirectional bookmark sync with Git (GitHub, GitLab, Codeberg, Gitea & more). One JSON file per bookmark, three-way merge, auto-sync, multiple profiles. Chrome & Firefox & Companion App. Linkwarden, Smart Search. Add via Git, CLI, or Actions. No middleman.
Project mention: GitSyncMarks – Browser extension that syncs bookmarks to your own GitHub repo | news.ycombinator.com | 2026-02-18 -
Twitter-Links-beta
A Chrome extension to show the latest tweets that link to the current page. Updated for Manifest v3 (by swyxio)
-
-
-
-
m3u8
This lightweight yet powerful browser extension leverages the industry-standard hls.js library to enable smooth playback of HLS streams (.m3u8 playlists) natively (by Chromo-lib)
-
GenresFox
A completely open-source, high-performance, and extremely minimalist browser new tab page extension.
Project mention: Show HN: GenresFox v0.4 – Hand-Written, Zero-Dependency Rust WASM | news.ycombinator.com | 2025-12-25This time, I'm not joking.
Visit the GenresFox Github repository to learn more: https://github.com/zayokami/GenresFox
-
leboncoin-bumper
Extension Chrome/Edge/Brave pour freelances : republie automatiquement tes annonces Leboncoin + veille de prospects multi-profils avec scoring, filtres avancés et réponse en un clic. 100% local, sans serveur tiers.
Project mention: Booster Leboncoin: the Manifest V3 Chrome extension that bumps my ads and watches prospects for me | dev.to | 2026-06-22The repo: ohugonnot/leboncoin-bumper — Manifest V3, zero deps, zero servers, MIT.
-
github-ui-translator
A browser extension for Chrome, Edge, and Firefox that translates GitHub's UI into multiple languages using local dictionaries. No external APIs — all translation runs locally.
Project mention: Building a Local-Only Browser Extension That Translates GitHub's UI—Not Your Content | dev.to | 2026-07-10View on GitHub
-
stop-the-slop
🚫 Spot AI-generated YouTube scripts and content farms in real-time. Open-source browser extension for Chrome & Firefox with thumbnail badges and sentence heatmaps.
Project mention: MauroPello/stop-the-slop: Spot AI-generated YouTube scripts | news.ycombinator.com | 2026-09-03 -
simple-image-converter
Chrome extension to convert any image (WebP, AVIF, JPG) to PNG format with a single click. Manifest V3, multi-language support.
Project mention: I hate WebP files. So I built a Chrome extension to kill them. | dev.to | 2025-12-16GitHub Repo: https://github.com/opzozi/simple-image-converter
-
impact_of_google_mv3_update_on_ad_blocker_effectiveness
Research artifact for PoPETs 2026 paper evaluating the impact of Google's Manifest Version 3 (MV3) update on ad blocker effectiveness
Project mention: Research finds MV3 does not affect ad-blocking or anti-tracking effectiveness | news.ycombinator.com | 2026-06-16 -
SaaSHub
SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives
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 manifest-v3 discussion
JavaScript manifest-v3 related posts
-
Hnpes – Hacker News Previous Entry Search for Firefox and Chrome
-
Show HN: GenresFox v0.4 – Hand-Written, Zero-Dependency Rust WASM
-
Show HN: I built a browser extension with zero dependencies
-
GenresFox Version 0.4.1 Update
-
GenresFox Version 0.4.1 Update
-
Good morning everyone, now I have WASM.
-
HNPES – A Chrome Extension to Instantly Find Previous Hacker News Submissions
-
A note from our sponsor - SaaSHub
www.saashub.com | 5 Oct 2026
Index
What are some of the best open-source manifest-v3 projects in JavaScript? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | YouTube_Summary_with_ChatGPT | 865 |
| 2 | keyFinder | 720 |
| 3 | SingleFile-MV3 | 603 |
| 4 | ocr-it | 414 |
| 5 | search-bookmarks-history-and-tabs | 339 |
| 6 | chrome-extension-webpack | 302 |
| 7 | bookmarks-organizer | 217 |
| 8 | GemType | 149 |
| 9 | download_with_aria2 | 93 |
| 10 | smartReader | 81 |
| 11 | share-to-mastodon | 67 |
| 12 | GitSyncMarks | 42 |
| 13 | Twitter-Links-beta | 38 |
| 14 | cra-crx-boilerplate | 35 |
| 15 | persistent-serviceworker | 34 |
| 16 | Analytics_AdBlocker | 32 |
| 17 | m3u8 | 23 |
| 18 | GenresFox | 20 |
| 19 | leboncoin-bumper | 13 |
| 20 | github-ui-translator | 12 |
| 21 | stop-the-slop | 10 |
| 22 | simple-image-converter | 8 |
| 23 | impact_of_google_mv3_update_on_ad_blocker_effectiveness | 8 |
Sponsored
Monitoring that respects your time & budget
APM, error tracking, and dashboards for modern web apps. Ten-minute setup, transparent flat pricing, and support from engineers who actually use the product.
www.appsignal.com