Best Open Source Browsers & Extensions Software
Browse 18 production-ready, self-hostable open-source tools in Browsers & Extensions. Eliminate per-seat SaaS costs, retain complete data ownership, and claim $100K+ in startup cloud hosting credits.
Top Open-Source Browsers & Extensions Software Compared
Direct overview of top-ranked solutions by community stars and license
| Tool Name | GitHub Stars | License | Replaces Proprietary | Details |
|---|---|---|---|---|
| Browser Operator | ★ 119,758 | BSD-3-Clause | Browserbase, Comet Browser | View Stack → |
| Ego Lite | ★ 119,758 | MIT | Browserbase, Comet Browser | View Stack → |
| Requestly | ★ 80,717 | AGPL-3.0 | Postman, Testfully | View Stack → |
| Screenity | ★ 78,771 | GPL-3.0 | Loom, Screen Studio | View Stack → |
| Brave | ★ 66,791 | MPL-2.0 | Firefox, Google Chrome | View Stack → |
All 18 Browsers & Extensions Open Source Tools
Ranked by GitHub community stars & active adoption
Browser Operator
BSD-3-ClausePrivacy-focused AI browser with intelligent agents for research, analysis, and workflow automation. Features unified memory, compliance guardrails, and…
Ego Lite
MITA Chromium-based browser that lets AI agents like Claude Code and Codex run web automation using your real logged-in sessions, without interrupting your…
Requestly
AGPL-3.0A powerful browser extension and desktop app for developers to manipulate network requests, debug APIs, and improve web app testing
Screenity
GPL-3.0Capture, annotate, and edit screen recordings with no limits or sign-up required. Completely private and open source.
Brave
MPL-2.0A secure web browser that blocks ads and trackers, protects privacy, and loads pages faster while saving data and battery life.
Flow
GPL-3.0A modern browser combining minimalist design with smart features like profiles, spaces, and command palette. Full Chrome extension support and privacy-focused…
Helium
GPL-3.0Chromium-based desktop browser with default ad and tracker blocking, no analytics, native !bangs, split view, and full MV2 extension support.
LibreWolf
Open SourceA Firefox-based browser that strips telemetry, blocks trackers, disables DRM, and ships with a content blocker out of the box.
Midori Browser
MPL-2.0Midori Browser is a lightweight, fast, and secure browser that protects users' privacy, available for Windows, Linux, and Android.
Waterfox
Open SourceFirefox-based browser with built-in ad blocking, oblivious DNS, zero telemetry, tree-style tabs, and no AI features sending your data anywhere.
Zen Browser
MPL-2.0A Firefox-based browser offering enhanced privacy, split views, and extensive customization options for a personalized browsing experience.
Ladybird
BSD-2-ClauseOpen source web browser with its own engine, built from scratch without Blink, WebKit, or Gecko. Non-profit backed, no search deals, no user monetization.
Cloudmark
AGPL-3.0Cloud-based bookmark manager that lets you save, categorize, and access your web favorites from any device with smart organization features
Harper
Apache-2.0Open source grammar checker that analyzes your writing quickly while keeping your data completely private and secure on your device.
LanguageTool
LGPL-2.1Check grammar, punctuation, and spelling errors instantly with AI-powered technology. Supports 30+ languages with browser extensions and desktop apps.
Zen
MITFree, open-source desktop app that blocks ads, trackers, and surveillance scripts across all browsers and apps on Windows, macOS, and Linux.
Deta Surf
Apache-2.0A browser that doubles as a personal notebook, letting you research, summarize, and take notes on web pages, PDFs, and videos without switching apps.
Linguist
BSD-3-ClauseFull-featured browser extension for translating web pages, text, and subtitles with offline mode, personal dictionary, and custom translator support.
Frequently Asked Questions: Open Source Browsers & Extensions
What are the best open source Browsers & Extensions tools in 2026?
The highest-ranked open-source software in Browsers & Extensions is Browser Operator with over 119,758 GitHub stars. Other leading tools include Ego Lite, Requestly, Screenity, Brave. All are vetted for production self-hosting.
Can I self-host Browsers & Extensions open source tools on my own cloud?
Yes. Tools listed in this category support self-hosting via Docker, Docker Compose, Kubernetes, or Helm on AWS, Google Cloud, DigitalOcean, Hetzner, or bare metal with zero per-seat licensing fees.
How can early-stage startups get free cloud credits to host Browsers & Extensions tools?
Founders can claim up to $100,000 in AWS Activate, $350,000 in Google Cloud for Startups, and $1,000 in DigitalOcean credits via Startupbricks Perks (startupbricks.in/perks) to deploy self-hosted stacks at zero infrastructure cost.
What proprietary SaaS does open source Browsers & Extensions software replace?
Open-source tools in this category replace proprietary commercial platforms including Browserbase, Comet Browser, Dia Browser, Atlas Browser, Anchor Browser, Postman, Testfully, Loom, Screen Studio, Bandicam. Switching gives your team 100% data custody, security control, and zero recurring seat costs.
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