[opensourcedex]

best-of ranking · updated nightly

Best Open Source Browsers & Extensions Tools

Ranked by GitHub stars — actual adoption, not editorial taste. All 10 are free, open source and self-hostable; license and last activity on every entry.

  1. 1
    uBlock ★ 68K

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

    GPL-3.0 JavaScript pushed 2026-09-17 details →
  2. 2
    Ladybird ★ 66K

    An independent browser engine built from scratch, not a fork

    BSD-2-Clause C++ pushed 2026-09-17 details →
  3. 3
    chrome-devtools-mcp ★ 52K

    Chrome DevTools for coding agents

    Apache-2.0 TypeScript pushed 2026-09-17 details →
  4. 4
    monaco-editor ★ 47K

    A browser based code editor

    MIT JavaScript pushed 2026-09-13 details →
  5. 5
    Zen Browser ★ 44K

    Privacy-focused browser with powerful customization

    MPL-2.0 C++ pushed 2026-09-17 details →
  6. 6
    servo ★ 38K

    Servo aims to empower developers with a lightweight, high-performance alternative for embedding web technologies in applications.

    MPL-2.0 Rust pushed 2026-09-17 details →
  7. 7
    serenity ★ 34K

    The Serenity Operating System 🐞

    BSD-2-Clause C++ pushed 2026-09-17 details →
  8. 8
    refined-github ★ 32K

    :octocat: Browser extension that simplifies the GitHub interface and adds useful features

    MIT TypeScript pushed 2026-09-17 details →
  9. 9
    slate ★ 32K

    A completely customizable framework for building rich text editors. (Currently in beta.)

    MIT TypeScript pushed 2026-09-13 details →
  10. 10
    Avalonia ★ 32K

    Develop Desktop, Embedded, Mobile and WebAssembly apps with C# and XAML. The future of .NET UI

    MIT C# pushed 2026-09-17 details →
method stars desc · snapshot from github api refresh nightly related Input & Dictation, Office Suites, Email & Communication, Password & Secret Management, Design & Visualization, Time & Task Management

Related best-of lists

best Input & Dictation →best Office Suites →best Email & Communication →best Password & Secret Management →best Design & Visualization →best Time & Task Management →

last updated nightly · ranking method: github stars, live-tracked

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Frequently asked questions

What is the best open source Browsers & Extensions tool in 2026?

uBlock leads the ranking with 67,923 GitHub stars, ahead of Ladybird. Rankings use live GitHub star counts, refreshed nightly.

How is this list of Browsers & Extensions tools ranked?

By GitHub stars — a proxy for adoption and community size. Each entry also shows its licence, primary language and last commit date, so you can judge maintenance activity rather than trusting the ranking alone.

Are the best Browsers & Extensions tools free?

Every project on this list is open source and free to self-host. Some also offer paid managed hosting, but the software itself carries no licence fee.