Browser Extension GitHub Repositories (2026) · Open Source Tools

Privacy-first password manager with built-in email aliasing. Fully encrypted and self-hostable.

The cross-harness, self-improving memory layer for AI agents. Join our community: https://discord.com/invite/zdNChS2fBu

uBlock Origin - An efficient blocker for Chromium and Firefox. Fast and lean.

StackPrism is a browser extension for detecting website technology stacks.

A powerful browser extension that supercharges DeepSeek Chat with custom tooling, persistent memory, and seamless project scaffolding. Generate and download files, run Python in-browser, create PowerPoint and Excel documents, build multi-file projects as ZIP archives, and manage custom skills and characters.

Open-source Chrome extension with a Spotlight-style command palette, instant tab, bookmark and history search, and a customizable new tab page.

A browser extension for easy on-device translation with a local LLM (PLaMo). Private, free, no server needed.

An open-source desktop app for macOS, Windows and browsers to monitor the performance and health of your Starlink.

Fast, reliable download accelerator and video downloader since 2013

Self-hosted collaborative password manager for teams: folder-level access control, AES-256-GCM encryption, LDAP/AD, OAuth2 SSO, audit trail, REST API, browser extension. PHP/MySQL, Docker.

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).

The cross-browser extension framework.

Blocks specific sites from appearing in Google search results

Finds larger/original versions of images and videos

Sync your browser to storage you own. No middleman, no account, no tracking

Free real-time audio effects for music listening: EQ, tube amp, AM radio, visualizer, and 100+ more. Web/PWA, desktop, Chrome/Edge extension, VST3.

Material Design icons for web browsers

Browser extension for AnythingLLM Docker & Desktop application

DuckDuckGo Privacy Essentials browser extension for Firefox, Chrome.

📚 A customizable dictionary extension that supports double-click lookups in 20+ languages, 1000+ dictionaries, text-to-speech, translation and Anki integration.