For browser, the first results are zen-browser/desktop (Zen Browser is an open-source desktop web browser based on the Gecko engine that offers privacy protection, a self-contained rendering engine, extension support, and extensive customization options), browserworks/waterfox (Waterfox is a privacy-focused web browser built on a fork of the Gecko engine that removes telemetry, supports both legacy and modern extensions, and offers robust tab management and cross-platform builds) and brave/brave-browser (Brave is a privacy-centric open-source web browser built on the Chromium engine that includes cross-platform support, built-in tracking protection, and developer tools, making it a direct fit for the search). mozilla-firefox/firefox and ungoogled-software/ungoogled-chromium round out the shortlist. Compare the match explanations and check the project documentation against your requirements.
Compare the best open-source web browsers on GitHub, ranked by stars and activity. Find the right open-source client for your workflow.
This project is an open-source desktop web browser built on the Gecko rendering engine. It is designed to prioritize user privacy and security, utilizing a multi-process architecture to isolate web content and maintain a secure sandbox environment for all browsing activities. The browser distinguishes itself through a highly modular interface engine that allows users to customize visual layouts and functional behaviors using style sheets and community-developed modifications. It supports advanced productivity workflows by enabling users to synchronize navigation state across multiple windows,
Zen Browser is an open-source desktop web browser based on the Gecko engine that offers privacy protection, a self-contained rendering engine, extension support, and extensive customization options.
Waterfox is a privacy-focused web browser built on a fork of the Gecko engine that removes all telemetry and tracking code while preserving full extension compatibility. It encrypts DNS queries through independent third-party resolvers to prevent centralized monitoring of browsing destinations, and organizes browser tabs into hierarchical parent-child trees with collapsible branches and keyboard-driven navigation. The browser maintains a backward-compatible runtime bridge that supports both legacy XUL-based add-ons and modern WebExtensions simultaneously, allowing users to keep using older or
Waterfox is a privacy-focused web browser built on a fork of the Gecko engine that removes telemetry, supports both legacy and modern extensions, and offers robust tab management and cross-platform builds.
Brave is a privacy-centric web browser built on the Chromium engine. It functions as a cross-platform navigation tool designed to protect user data by automatically blocking trackers and advertisements by default. The browser distinguishes itself through integrated search capabilities that allow for programmatic control over query execution and data retrieval. It provides a platform for custom search engine development, enabling users to apply specific ranking rules, filter content based on geographic or temporal constraints, and enrich results with real-time structured data. Beyond its core
Brave is a privacy-centric open-source web browser built on the Chromium engine that includes cross-platform support, built-in tracking protection, and developer tools, making it a direct fit for the search.
Firefox is a cross-platform web browser engine designed to render web content, execute JavaScript, and manage secure browsing sessions. It utilizes a multi-process isolation architecture that distributes browser tasks across independent operating system processes to ensure stability and prevent site-specific failures from impacting the entire application. The engine incorporates a sandboxed execution environment to restrict web content and untrusted scripts to isolated memory compartments, enforcing security policies that prevent unauthorized access to system resources. The project distinguis
Firefox is a fully featured, cross-platform open-source web browser with robust privacy protection, extension support, and its own self-contained rendering engine.
Ungoogled Chromium is a desktop web browser derived from the open-source Chromium codebase, modified to remove all background communication with external services and proprietary dependencies. It functions as a privacy-focused distribution that ensures user data remains local by eliminating telemetry hooks and data collection integrations. The project distinguishes itself through extensive source-code pruning and domain-substitution patching, which replace hardcoded service URLs with non-functional placeholders to prevent unauthorized data transmission. It further hardens the browser runtime
Ungoogled Chromium is a self-contained desktop web browser derived from Chromium that strips away Google integration and telemetry for maximum privacy, while retaining full extension support, developer tools, and customization options.
This project is a Chromium-based mobile browser and rendering engine designed for mobile platforms. It functions as a web extension host, allowing the execution of browser extensions within a mobile environment to provide custom functionality. The project distinguishes itself through custom user interface modifications, such as the implementation of a specialized night mode and the relocation of the address bar for improved ergonomics. It also includes a remote debugging interface and protocol that allow an external developer console to connect to a live browser instance for inspecting and tr
This project is an open-source Chromium-based mobile browser featuring web extension support, a custom night mode, and developer debugging tools, fitting the core browser category well despite focusing primarily on mobile environments.
Thorium is a web browser built from the Chromium project, designed for high performance and expanded compatibility. It utilizes aggressive compiler optimizations and CPU-specific instruction sets, such as AVX2 and SIMD, to increase page rendering and JavaScript execution speeds. The project distinguishes itself by providing custom builds that enable modern web browsing on legacy versions of Windows and Linux. It further diverges from standard browser implementations by integrating Widevine DRM and native support for high-efficiency media formats, including HEVC and JPEG XL. Broad capabilitie
Thorium is a Chromium-based web browser optimized for performance and extended hardware compatibility, though its primary focus is speed and legacy support rather than privacy features or unique engine design.
Min is a minimalist, privacy-focused web browser designed to limit data collection and remove interface clutter. It serves as an ad-blocking tool that prevents tracking scripts and advertisements from loading to improve page speed and protect user identity. The browser differentiates itself through organized tab management, where related tabs are grouped into named tasks to separate work streams. It features a tag-based bookmark manager that replaces traditional hierarchical folders with custom labels and provides a simplified reader view to strip away non-essential page elements for focused
Min is a privacy-focused, minimalist web browser that provides content filtering and custom tab management, though it relies on Electron rather than a custom rendering engine and lacks some advanced developer features.
Ungoogled-Chromium is a privacy-focused web browser based on Chromium that is stripped of background requests and telemetry to prevent data collection by third parties. It functions as a hardened environment created by removing built-in service integrations and blocking runtime requests to stop automatic data transmission to remote servers. The project distinguishes itself through source-code level modifications, including the replacement of specific domain strings with non-existent alternatives to block network connections. It utilizes static build-time service removal to eliminate telemetry
This repository provides a privacy-focused web browser based on Chromium with telemetry and background requests removed, though it lacks built-in cross-platform sync and requires manual installation of extensions.
qutebrowser is a keyboard-driven web browser built on the Qt framework and the Chromium-based rendering engine. It provides a minimalist interface that prioritizes content visibility by removing traditional toolbars and visual clutter, relying instead on a command-line interaction model for navigation and browser control. The browser is designed for users who prefer to manage web tasks through rapid keystrokes rather than mouse-based graphical interfaces. It includes an integrated document viewer that renders PDF files directly within the application window, removing the need for external sof
This repository provides a keyboard-driven, privacy-capable browser with a self-contained rendering engine and customization options, though it lacks built-in cross-platform sync and traditional extension support.
EinkBro is designed to fit E-Ink devices' needs; no unnecessary UI transitions and animations, clear B&W icons, useful features for an optimal e-ink reading experience. It's originated from FOSS Browser, which is fully free/libre (as in freedom) Android app.
EinkBro is a privacy-focused open-source web browser derived from FOSS Browser, tailored specifically for E-Ink Android devices, though it lacks desktop cross-platform sync and full extension support.
| Repository | Stars | Language | License | Last push |
|---|---|---|---|---|
| zen-browser/desktop | 42.9K | JavaScript | MPL-2.0 | |
| browserworks/waterfox | 6K | JavaScript | NOASSERTION | |
| 21.7K |
| — |
| mpl-2.0 |
| mozilla-firefox/firefox | 11.3K | JavaScript | other |
| ungoogled-software/ungoogled-chromium | 26.9K | Python | BSD-3-Clause |
| kiwibrowser/src | 2.9K | — | other |
| alex313031/thorium | 6.8K | C++ | bsd-3-clause |
| minbrowser/min | 9K | JavaScript | Apache-2.0 |
| eloston/ungoogled-chromium | 27K | Python | BSD-3-Clause |
| qutebrowser/qutebrowser | 11.6K | Python | GPL-3.0 |