Alternatives to Mozilla Firefox for all platforms with Open Source License

  • Chromium

    Chromium is the open-source browser project from which Google Chrome takes its source.

    Free Open Source Mac Windows Linux Android BSD ... PC-BSD Xfce

    Chromium icon
    • Chromium is the core of the Chrome browser. It functions well enough as a browser but lacks some of Chrome's features (e.g. built in language translator). Even though Chromium is open source, it still "phones home" to Google, which has privacy implications. There are more private Chromium-based browsers, such as Brave and Iridium. JohnFastmanDec 2016 • 27 agrees and 9 disagrees Disagree   Agree
    • Chromium is most likely the heart of Google Chrome, Opera and some browsers without fancy features. SiliconeValleySep 2016 • 11 agrees and 3 disagrees Disagree   Agree
    • Chromium is not a ready-for-the-consumer software. It is a open source project that needs to be implemented to make it work. jacksarroccoJul 2016 • 16 agrees and 59 disagrees Disagree   Agree
  • Pale Moon

    Pale Moon is an Open Source, Goanna-based web browser available for Microsoft Windows and Linux focusing on efficiency and ease of use. Pale Moon offers you a...

    Free Open Source Windows Linux

    Pale Moon icon
    • When Firefox become more and more bloated Pale Moon is lightweight, offers stability and compatibility with the FF extensions (for now, because WebExtensions). It also works great with a lot of tabs(400 or more). Guest • Mar 2017 • 22 agrees and 2 disagrees Disagree   Agree
    • So far, Pale Moon gives me features I want that Firefox has disabled and will soon be gone completely in Firefox 57. Firefox 57 will be a Chrome-like boat anchor. Pale Moon is very stable, lightweight and is fast Guest • Apr 2017 • 19 agrees and 3 disagrees Disagree   Agree
    • Much more stable than the actual firefox. 1 crash per day vs. 1 crash per two weeks on MacOSX Guest • Mar 2016 • 13 agrees and 4 disagrees Disagree   Agree
    • Pale Moon is very lightweight (low RAM usage), and maintains the look and feel of earlier versions of Firefox. Essentially, this is the Firefox Mozilla should have made. Guest • May 2017 • 6 agrees and 1 disagrees Disagree   Agree
    • Firefox is no longer just a good browser. Firefox is going to be a Google Chrome clone. It is dropping support for legacy add-ons. Firefox is dropping support for XP and Vista. Pale Moon has committed to retaining support for add-ons, menu's, security and still remains lightweight. Guest • Apr 2017 • 7 agrees and 3 disagrees Disagree   Agree
    • Pale Moon resembles old Firefox, and maintains support for old extensions, and old features. Guest • Mar 2018 • 2 agrees and 0 disagrees Disagree   Agree
    • It is faithful to the core principles of Firefox (customization, extendibility, user friendliness...), avoiding the bloating and the questionable decisions taken in the last years by Mozilla. Pale Moon is the browser for those of us that loved Firefox in its golden years. Guest • Jun 2018 • 1 agrees and 0 disagrees Disagree   Agree
    • Pale Moon is very good, all sites are loading almost the same as Firefox, but uses less RAM & CPU, so the system is working faster than with Firefox, and also removed unnecessary functions. Pale Moon add-ons are very useful, especially YouTube Downloader and Adblock Latitude. Configurable very, very nice browser, 10 out of 10 points. Guest • May 2018 Disagree   Agree
    • Firefox classic UI and faster than Firefox. It's more user friendly and easier to use. Firefox is too jumbled and complicated. Guest • Apr 2018 • 0 agrees and 1 disagrees Disagree   Agree
  • Waterfox

    Waterfox is a high performance browser based on the Mozilla platform. Made specifically for 64-bit systems, Waterfox has one thing in mind: speed.

    Free Open Source Mac Windows Linux Android Android Tablet ... PortableApps.com

    Waterfox icon
    • Waterfox is made for x64 (amd64) CPUs, and it also delivers you a fine service concerning privacy, firstly devs removed telemetry and tracking implented recently in Firefox. Secondly it supports old extensions and pocket was removed AkinoJun 2017 • 13 agrees and 2 disagrees Disagree   Agree
    • It depends what you want from a Firefox alternative. Waterfox is essentially identical to Firefox, except that it's a 64-bit, not a 32-bit browser. It's still open source and fully compatible with all options, extensions and everything else. JohnFastmanDec 2016 • 13 agrees and 3 disagrees Disagree   Agree
    • Great 64-bit alternative, it's lighting-fast & ditches the telemetry. Guest • Aug 2017 • 7 agrees and 2 disagrees Disagree   Agree
    • It is completely compatible with every feature present in Firefox, so you don't lose *anything* when migrating, and win privacy, speed and security. Guest • Oct 2017 • 5 agrees and 1 disagrees Disagree   Agree
    • Uses almost all the original code of firefox but keeps the "undesired" NPAPI that firefox dropped, another words user retains ability to change the browser's UI & behaviour Guest • Nov 2017 • 3 agrees and 1 disagrees Disagree   Agree
    • Waterfox is so far the closest to modern Firefox, but with better privacy, and a commitment to maintain XUL/XPCOM support indefinitely so that I can keep using a modern theme with square tabs, centred bookmarks and of course the add-on bar. birdNov 2017 • 2 agrees and 1 disagrees Disagree   Agree
    • So far this is the BEST replacement I have found for FireFox 57 (which is just a Chrome clone at this point) Guest • Nov 2017 • 2 agrees and 1 disagrees Disagree   Agree
    • Open source fork of Firefox with a few privacy settings (not not all) changed by default. Guest • May 2018 • 1 agrees and 0 disagrees Disagree   Agree
  • Brave

    Brave Web Browser is a fast, free, secure web browser with a built-in ad blocker*, tracking and security protection, and optimized data and battery experience. *What...

    Free Open Source Mac Windows Linux Android iPhone ... Android Tablet iPad Electron / Atom Shell

    Brave icon
    • Currently (March 2017), Brave is not a mature project. It's an open-source privacy-oriented browser and very fast. But you rely on the developers to provide most of the privacy settings, and you can't install extensions. Firefox remains much more customizable via it's about:config menu options. JohnFastmanMar 2017 • 13 agrees and 2 disagrees Disagree   Agree
    • It's really really nice and fast, but is still in very early development and lacking a lot of features Guest • Apr 2017 • 7 agrees and 1 disagrees Disagree   Agree
    • Built-in ad-blocker, free and open-source. Guest • Feb 2018 • 1 agrees and 1 disagrees Disagree   Agree
    • Read my review. Brave is Firefox baby with more privacy and clear interface AkinoJun 2017 • 2 agrees and 4 disagrees Disagree   Agree
  • Firefox Developer Edition

    Firefox Developer Edition brings your core dev tools together with some powerful new ones that will extend your ability to work across multiple platforms from one place....

    Free Open Source Mac Windows Linux PortableApps.com

    Firefox Developer Edition icon
    • If you have issues with Firefox not being fast enough but don't wanna go chome try this! Also faster than chrome. axy_davidJan 2018 • 2 agrees and 0 disagrees Disagree   Agree
  • Cyberfox

    Cyberfox is a 64-bit version (32-bit download also available) of Mozilla Firefox , compiled With Microsoft Visual Studio 2012, Windows 8 SDK & Intel Composer XE 2013.

    Free Open Source Windows Linux

    Cyberfox icon
    • Warning On their privacy page, we can see that they use our personal data linked to our social account...
    • Is "bigger" in capabilities than Firefox (which I've used near exclusively for 15 years or so) -- Have been using Cyberfox with mad love for near three years now, and just had my heart broken to hear they were shutting it down as of first half of 2018. :( Guest • Sep 2017 • 4 agrees and 2 disagrees Disagree   Agree
    • Native 64bit, fast, clean from adware, suspicious extensions and it has it's own user profile. Many Firefox alternative browsers share user profile with Firefox. Guest • Dec 2016 • 1 agrees and 2 disagrees Disagree   Agree
    • Excellent user support, less memory-intensive than either the official Firefox 64-bit or Waterfox (based on my system), and it works with Firefox Sync. Guest • Mar 2017 • 0 agrees and 1 disagrees Disagree   Agree
  • SeaMonkey

    The SeaMonkey project is a community effort to develop the SeaMonkey all-in-one internet application suite. A lighter alternative to...

    Free Open Source Mac Windows Linux BSD PortableApps.com

    SeaMonkey icon
    • Less resource-intensive than Firefox. Generally fast and stable. Guest • May 2017 • 2 agrees and 0 disagrees Disagree   Agree
    • Lighter on resources, had UI we were used to in old Firefox(version 3.x), some features like webRTC might be missing. mzs_47Sep 2015 • 2 agrees and 1 disagrees Disagree   Agree
    • Within Linux works much more fast and compatible with Firefox extensions Guest • Jul 2015 • 1 agrees and 1 disagrees Disagree   Agree
  • Ungoogled Chromium

    A Google Chromium variant for removing Google integration and enhancing privacy, control, and transparency.

    Free Open Source Mac OS X Windows Linux

    Ungoogled Chromium icon
    • Despite Chromium being "open source", it still downloads Google-related crap and phones home to Google. If you value your online privacy, you'll appreciate the Ungoogled Chromium browser, which removes all that. However, Firefox remains more customizable in terms of privacy options. JohnFastmanMar 2017 • 9 agrees and 1 disagrees Disagree   Agree
  • Konqueror

    Konqueror is an Open Source web browser powered by the KHTML rendering engine (and optionally Webkit) which means it supports the latest web standards such as HTML5...

    Free Open Source Mac Windows Linux BSD KDE

    Konqueror icon
    • Discontinued The project seems to be no longer developed. In August 2017 the ex-maintainer of Konqueror, David Faure, proposed to integrate QupZilla, now https://alternativeto.net/software/qupzilla/ , into KDE in order to replace the aging Konqueror.

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