Open Source Mozilla Firefox Alternatives

    The best open source alternative to Mozilla Firefox is Pale Moon, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 100 alternatives to Mozilla Firefox and loads of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Mozilla Firefox are Brave (Free, Open Source), Waterfox (Free, Open Source), Chromium (Free, Open Source) and Firefox Nightly (Free, Open Source).

    This page was last updated Jul 27, 2021

    1. Rekonq is a web browser for KDE based on WebKit. It first focuses on being a light, fast & clean way to access to net. Its development is doubly based on using the new amazing features offered by the WebKit rendering engine and on the rock solid network KDE technologies.

      Discontinued

      The project seems to be no longer maintained. Last version, 2.4.2, released in January 2014, can be still downloaded from SourceForge.

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    2. QtWeb Internet Browser - lightweight, secure and portable browser having unique user interface and privacy features.

      Discontinued

      Last version was released 2 years ago (9th September 2013) , last source code change was 2 years ago (9th October 2013)

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    3. Sandcat Browser 5 brings unique features that are useful for pen-testers and web developers. Sandcat is built on top of Chromium and uses the Lua programming language to provide extensions and scripting support.
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    4. Light Firefox is a light browser based on Mozilla source code. Many components are slimmed down, so it can start faster and use less memory. By default, Light can run along with Firefox. Both x86 and x64 builds are available.

      Discontinued

      The project seems to be no longer developed. Last version, 49rc, released in October 2016, can be still downloaded from SourceForge.

      Light Firefox vs Mozilla Firefox opinions
      pros, cons and recent comments
      Pretty lightweight. May have some features that are missing but for us who dont use those features this is a good alternative!
      Positive comment over 4 years ago

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    5. "If you're worried about Pale Moon's issues, know that one of our community chatroom members is developing a fork called Web Browser that is focused on stability, privacy and customizability even more so than its predecessor.
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    6. Wexond is an open-source privacy-focused, beautiful and extensible web browser with a totally new user experience. It's built on top of Electron and React.
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      • FreeOpen Source
      • Android
      • Android Tablet
      Lucid Browser is a free and open source browser designed to be small, light, fast, and simple. The app itself is as small as 1 MB. The browser uses a custom homepage that loads locally for quick start-ups. It is easy to use and very handy.
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    7. The concept of the "Sushi Browser" is wanting to utilize the screen to the maximum capacity just by a simple operation. Its goal is to be as fantastic as sushi.
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      • FreeOpen Source
      • Android
      • Android Tablet
      Iceraven Browser is a web browser for Android, based on Mozilla's Fenix version of Firefox, GeckoView and Mozilla Android Components.
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    8. Unbranded builds are available from the continuous integration builds on treeherder.mozilla.org. What is different compared to Nightly and Developer editions (which allow unsigned addons too)?
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    Showing 50 of 91 alternatives