Open Source Browsers & Extensions
A curated collection of the best open source web browsers and browser extensions enhancing productivity or utility.
See also:Web BrowsersBrowser Extensions
An independent browser engine built from scratch, not a fork
Stars
66,351Last commit
11 hours agoLicense
BSD-2-Clause
Open source web browser with its own engine, built from scratch without Blink, WebKit, or Gecko. Non-profit backed, no search deals, no user monetization.
Open Source Alternative to:
Privacy-focused browser with powerful customization
Stars
44,646Last commit
16 hours agoLicense
MPL-2.0
A Firefox-based browser offering enhanced privacy, split views, and extensive customization options for a personalized browsing experience.
Open Source Alternative to:
Privacy-first browser with ad-blocking and no bloat
Stars
21,053Last commit
12 hours agoLicense
GPL-3.0
Chromium-based desktop browser with default ad and tracker blocking, no analytics, native !bangs, split view, and full MV2 extension support.
Open Source Alternative to:
Chromium browser built for sharing with AI agents
Stars
16,660Last commit
6 days agoLicense
MIT
A Chromium-based browser that lets AI agents like Claude Code and Codex run web automation using your real logged-in sessions, without interrupting your browsing.
Open Source Alternative to:
Fast, private browser that puts you first
Stars
23,741Last commit
7 hours agoLicense
MPL-2.0
A secure web browser that blocks ads and trackers, protects privacy, and loads pages faster while saving data and battery life.
Open Source Alternative to:
Free, private screen recording for Chrome
Stars
18,735Last commit
4 days agoLicense
GPL-3.0
Capture, annotate, and edit screen recordings with no limits or sign-up required. Completely private and open source.
Open Source Alternative to:
Fast grammar checking that respects your privacy
Stars
16,016Last commit
4 hours agoLicense
Apache-2.0
Open source grammar checker that analyzes your writing quickly while keeping your data completely private and secure on your device.
Open Source Alternative to:
AI-powered grammar checker for 30+ languages
Stars
15,093Last commit
5 hours agoLicense
LGPL-2.1
Check grammar, punctuation, and spelling errors instantly with AI-powered technology. Supports 30+ languages with browser extensions and desktop apps.
Open Source Alternative to:
Intercept, modify, and debug HTTP(S) requests effortlessly
Stars
6,760Last commit
5 hours agoLicense
AGPL-3.0
A powerful browser extension and desktop app for developers to manipulate network requests, debug APIs, and improve web app testing
Open Source Alternative to:
Privacy-first browser built for power users
Stars
6,319Last commit
7 days agoLicense
Unknown
Firefox-based browser with built-in ad blocking, oblivious DNS, zero telemetry, tree-style tabs, and no AI features sending your data anywhere.
Open Source Alternative to:
System-wide ad-blocking and privacy protection, no extensions needed
Stars
4,241Last commit
23 hours agoLicense
MIT
Free, open-source desktop app that blocks ads, trackers, and surveillance scripts across all browsers and apps on Windows, macOS, and Linux.
Open Source Alternative to:
Browser and notebook combined with local-first AI
Stars
3,584Last commit
1 month agoLicense
Apache-2.0
A browser that doubles as a personal notebook, letting you research, summarize, and take notes on web pages, PDFs, and videos without switching apps.
Open Source Alternative to:
Firefox fork hardened for privacy, security, and freedom
Stars
1,333Last commit
13 hours agoLicense
Unknown
A Firefox-based browser that strips telemetry, blocks trackers, disables DRM, and ships with a content blocker out of the box.
Open Source Alternative to:
Fast, secure browsing with powerful organization features
Stars
1,078Last commit
4 months agoLicense
GPL-3.0
A modern browser combining minimalist design with smart features like profiles, spaces, and command palette. Full Chrome extension support and privacy-focused browsing.
Open Source Alternative to:
Privacy-focused translation with offline capabilities
Stars
1,063Last commit
21 days agoLicense
BSD-3-Clause
Full-featured browser extension for translating web pages, text, and subtitles with offline mode, personal dictionary, and custom translator support.
Open Source Alternative to:
Open-source AI browser for intelligent web automation
Stars
507Last commit
6 months agoLicense
BSD-3-Clause
Privacy-focused AI browser with intelligent agents for research, analysis, and workflow automation. Features unified memory, compliance guardrails, and seamless integrations.
Open Source Alternative to:
Fast, secure, and privacy-focused web browsing
Stars
406Last commit
10 days agoLicense
MPL-2.0
Midori Browser is a lightweight, fast, and secure browser that protects users' privacy, available for Windows, Linux, and Android.
Open Source Alternative to:
Organize and access your bookmarks seamlessly in the cloud
Stars
76Last commit
2 months agoLicense
AGPL-3.0
Cloud-based bookmark manager that lets you save, categorize, and access your web favorites from any device with smart organization features
Open Source Alternative to:
CodeRabbit – The leading AI Code Review platform. Ship better quality code in 50% less time, with 90% fewer bugs.
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