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OpenAlternative

Open Source Firefox Alternatives

A curated collection of the 6 best open source alternatives to Firefox.

The best open source alternative to Firefox is Ladybird. If that does not suit you, we have compiled a ranked list of other open source Firefox alternatives to help you find a suitable replacement.

Firefox alternatives are mainly Web Browsers. Browse these if you want a narrower list of alternatives or are looking for a specific functionality of Firefox.

Written by OpenAlternative Last updated: June 2, 2026
#1

Ladybird

Open source web browser with its own engine, built from scratch without Blink, WebKit, or Gecko. Non-profit backed, no search deals, no user monetizat

Open source web browser with its own engine, built from scratch without Bl...

#2

Zen Browser

A Firefox-based browser offering enhanced privacy, split views, and extensive customization options for a personalized browsing experience.

A Firefox-based browser offering enhanced privacy, split views, and extens...

#3

Brave

A secure web browser that blocks ads and trackers, protects privacy, and loads pages faster while saving data and battery life.

A secure web browser that blocks ads and trackers, protects privacy, and l...

#4

Helium

Open-source Chromium-based browser offering best-in-class privacy protection, unbiased ad-blocking, split view, native !bangs, and zero bloat by defau

Open-source Chromium-based browser offering best-in-class privacy protecti...

#5

Flow

A modern browser combining minimalist design with smart features like profiles, spaces, and command palette. Full Chrome extension support and privacy

A modern browser combining minimalist design with smart features like prof...

#6

Midori Browser

Midori Browser is a lightweight, fast, and secure browser that protects users' privacy, available for Windows, Linux, and Android.

Midori Browser is a lightweight, fast, and secure browser that protects us...