Extension

88 software

88 open-source projects ship Extension installers, with 329,622 stars in total, 34 of which released a new version in the last 7 days.

Included when the download list contains a browser extension package. Projects already published on an extension store usually attach none, so this page holds the self-distributed part.

Download & install notes
  • A .crx is a Chrome / Edge package. Chrome blocks installs from outside the store: enable Developer mode on the Extensions page and drag the file in, or unpack it and use "Load unpacked".
  • An .xpi targets Firefox — install it from Add-ons Manager → Install Add-on From File. Unsigned extensions only load in Developer Edition / Nightly.
  • Extensions receive all their permissions at install time. Check the repository README for which sites it can read and modify before installing.

Category

Languages


gorhill

uBlock

gorhill/uBlock

69.2k

An efficient, low-resource content blocker for Chromium and Firefox browsers, blocking ads, trackers, malware, and more by default.

1.76.1b0 JavaScript
Author updated 4d ago
can1357

oh-my-pi

can1357/oh-my-pi

38.9k

A terminal AI coding agent with hash-anchored edits, LSP, Python, browser, subagents, and more.

v18.20.0 TypeScript
Author updated 18h ago
darkreader

darkreader

darkreader/darkreader

22.6k

An open-source browser extension that analyzes web pages and generates dark mode to reduce eyestrain while browsing, supporting Chrome, Firefox, and Edge with extensive customization.

v4.9.135 TypeScript
Author updated 7d ago
xifangczy

cat-catch

xifangczy/cat-catch

22.5k

A browser resource sniffing extension that filters and lists resources on the current page, supporting Chrome, Edge, and Firefox.

2.7.4 JavaScript
Author updated 17d ago
AutomaApp

automa

AutomaApp/automa

21.7k

Automa is a browser extension for Chrome and Firefox that automates tasks by connecting blocks — form filling, scheduled workflows, screenshots, and web scraping, no coding required.

v1.29.12 Vue
Author updated Aug 11, 2025
ruffle-rs

ruffle

ruffle-rs/ruffle

18.9k

An Adobe Flash Player emulator written in Rust, targeting both desktop and the web via WebAssembly, designed to keep Flash content playable after Flash's discontinuation.

nightly-2026-11-13 Rust
Author updated 18h ago
Automattic

harper

Automattic/harper

17.7k

A completely offline, open-source grammar checker that runs entirely on-device with no cloud round-trips, no telemetry, and sub-10ms suggestions.

v3.2.0 Rust
Author updated 1h ago
jupyter

notebook

jupyter/notebook

13.5k

Jupyter Notebook is a web-based interactive computing environment for writing and running code, displaying results, and mixing documentation in the browser, ideal for data analysis, research, and teaching.

v7.7.0b1 Jupyter Notebook
Author updated 4d ago
fishjar

kiss-translator

fishjar/kiss-translator

13.3k

A minimalist, open-source bilingual translation browser extension and userscript supporting web pages, text selection, input boxes, YouTube subtitles, and more, compatible with multiple translation services.

v2.2.3 JavaScript
Author updated 53m ago
mengxi-ream

read-frog

mengxi-ream/read-frog

10.4k

An open-source AI-powered browser extension for language learning, supporting immersive translation, article analysis, multiple AI models, and a personalized learning experience.

v1.59.3 TypeScript
Author updated 9h ago
FluentRead

FluentRead

FluentRead/FluentRead

8.9k

A fully open-source browser translation extension and open-source alternative to Immersive Translate, supporting bilingual translation, text selection, AI reading assistance, image and document translation, and bilingual video subtitles.

v0.0.41 TypeScript
Author updated 5d ago
floccusaddon

floccus

floccusaddon/floccus

8.6k

A cross-browser bookmark sync tool that syncs bookmarks privately via Nextcloud, Google Drive, Dropbox, Git, or WebDAV, with a focus on privacy.

v5.13.0 TypeScript
Author updated 5d ago
opengeos

GeoLibre

opengeos/GeoLibre

8.5k

A lightweight, cloud-native GIS platform for visualizing, exploring, and analyzing geospatial data in the browser, desktop, mobile, and Jupyter notebooks.

v3.7.0 TypeScript
Author updated 5d ago
anefzaoui

misterdownloadmanager

anefzaoui/misterdownloadmanager

8.2k

misterdownloadmanager is a Rust-written cross-platform open-source download manager for Windows, macOS, and Linux, with up to 16 parallel connections, resume, scheduler, and a browser extension for video sniffing.

v0.5.2 Rust
Author updated 3d ago
scriptscat

scriptcat

scriptscat/scriptcat

5.8k

A powerful userscript manager browser extension fully compatible with Tampermonkey scripts, featuring an innovative background script execution framework, rich API extensions, cloud sync, scheduled scripts, and a security sandbox.

v1.5.1 TypeScript
Author updated 4d ago
qixing-jk

all-api-hub

qixing-jk/all-api-hub

5.1k

A one-stop AI relay account management browser extension offering balance/usage dashboard, auto check-in, one-click key usage, price comparison, availability testing, and advanced channel management.

v4.10.1 TypeScript
Author updated 1d ago
keleus

BewlyCat

keleus/BewlyCat

4.6k

A Bilibili browser extension based on BewlyBewly, retaining the original UI beautification features while adding default player mode, custom shortcuts, per-UP volume balancing, random playlist playback, and many other enhancements.

v1.8.3 TypeScript
Author updated 15d ago
uBlockOrigin

uBOL-home

uBlockOrigin/uBOL-home

4.0k

uBlock Origin Lite (uBOL) is an efficient content blocker based on the MV3 API that operates entirely declaratively, requiring no permanent process for filtering, with the browser handling CSS/JS injection without consuming CPU or memory.

2026.1110.1816 JavaScript
Author updated 2d ago
EdgeTranslate

EdgeTranslate

EdgeTranslate/EdgeTranslate

2.9k

Edge Translate is an open-source browser translation extension for Chrome, Edge, Firefox, QQ and 360 browsers, offering selection translation, full-page translation and PDF translation with a reading-first experience

2.4.3 JavaScript
Author updated Aug 19, 2023
polywock

globalSpeed

polywock/globalSpeed

2.8k

A web extension to set a default speed for video and audio, with URL rules, media hotkeys, volume boost, and pitch shift filters.

v3.4.124 TypeScript
Author updated Sep 28, 2026
Jamailar

Beav

Jamailar/Beav

2.4k

Beav is a local-first AI content studio covering research, topic selection, writing and rewriting, image generation and talking-head video editing, with a knowledge base and long-term account memory for macOS, Windows and Linux.

v2.10.7 Rust
Author updated 2d ago
zhu1090093659

deepseek-pp

zhu1090093659/deepseek-pp

1.9k

An open-source browser extension for DeepSeek Web that turns it into an AI Agent workspace with bilingual experience, memory, projects, Skills, MCP, multimodal media, browser control, conversation export, and automation.

v1.14.0 TypeScript
Author updated Aug 8, 2026
zhitongblog

solomd

zhitongblog/solomd

1.6k

A local-first Markdown editor with a built-in MCP server, letting AI agents like Claude Code, Codex, and Cursor drive your vault directly. Supports 14 AI providers BYOK.

v5.0.21 TypeScript
Author updated 1d ago
ja7ad

hydra

ja7ad/hydra

1.4k

A high-performance multi-source download manager and accelerator developed in Rust, supporting Windows, macOS, and Linux with GUI, CLI, and browser integration.

v1.2.2-rc Rust
Author updated 1d ago