What are the best Mozilla Firefox alternatives in 2021?

    Mozilla Firefox is described as 'A free and open source web browser descended from the Mozilla Application Suite. Firefox is highly extensible, with thousands of third-party add-ons available' and is one of the leading apps in the Web Browsers category. There are more than 100 alternatives to Mozilla Firefox for a variety of platforms, including Windows, Mac, Android, Linux and Android Tablet. The best alternative is Vivaldi, which is free. Other great apps like Mozilla Firefox are Pale Moon (Free, Open Source), Brave (Free, Open Source), Waterfox (Free, Open Source) and Opera (Free).

    This page was last updated Oct 19, 2021
    1. Vivaldi is extremely customizable, presenting a wide range of settings and built-in features designed to put the user in control. Its Chromium-based engine makes it fast and compatible with most Chrome extensions, and Vivaldi removes the code that tracks users from it.
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      Vivaldi vs Mozilla Firefox opinions
      Most users think Vivaldi is a great alternative to Mozilla Firefox.
       all • positive • negative      relevance • date
      RemovedUser The side tab function is very efficient.
      Top positive comment  about 2 years ago

      13
      s20 A great browser with enough options to keep power users happy for days. Sadly based on Chromium, it is subject to the limitations of that platform, but it also gets their add-on store, so that's great too.
      Top positive comment  over 1 year ago

      5
      It's very laggy to open some pages, on Linux, it's hard to install and often lacks basic codecs, so videos on youtube looks pixelated!
      Top negative comment  almost 2 years ago

      10
      MarkoIndaco Vivaldi is a good browser (always in development) with a unique community. For what concern revenues there's a page for it: https://vivaldi.com/blog/vivaldi-business-model/
      Positive comment • about 2 months ago

      0
      User1639378 Not a real alternative firefox is an opensource standalone browser. vivaldi is based on chromium and only provides a proprietary UI for the chromium core. You cant also disable telemetry in vivaldi due to their business model.
      Negative comment • 3 months ago

      -1
      architsastam Vivaldi is simply the next stop for Firefox users, while it is freeware, it is technically closed and open-source. Some of the browser's components are closed while some are open and the source codes are available on Vivaldi's website.
      Positive comment • 6 months ago

      2
      josephcw Vivaldi is very fast and has unusual features. Unfortunately, it's not open-source, so I can't recommend it over Firefox.
      Positive comment • 9 months ago

      -2
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      7 of 33 comments
    2. Pale Moon is an Open Source, Goanna-based web browser available for Microsoft Windows and Linux (with other operating systems in development), focusing on efficiency and customization. Make sure to get the most out of your browser!.
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      Pale Moon vs Mozilla Firefox opinions
      Almost everyone thinks Pale Moon is a great alternative to Mozilla Firefox.
       all • positive • negative      relevance • date
      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).
      Top positive comment  over 4 years ago

      20
      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
      Top positive comment  over 4 years ago

      11
      Old looking UI. It needs to be updated.
      Top negative comment  over 1 year ago

      0
      mcgiwer Cons: * as base is used a very old version of Firefox * bad user experience (interface) * an very old (and probably already unsupported) version of Sync * no support for modern plugins, extensions and themes
      Negative comment • about 2 months ago

      -1
      sanjeetk4 It is really light and fast.
      Positive comment • 2 months ago

      0
      jakeBeefiller Privacy and security focus.
      Positive comment • 8 months ago

      0
      Pale Moon is fast, secure and open source. It's compatible with old Firefox's extensions and is private. Lightweight and private. The best alternative
      Positive comment • about 1 year ago

      2
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      7 of 20 comments
    4. 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 is Brave Ad Replacement?
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      Brave vs Mozilla Firefox opinions
      Most users think Brave is a great alternative to Mozilla Firefox.
       all • positive • negative      relevance • date
      It's really really nice and fast, but is still in very early development and lacking a lot of features
      Top positive comment  over 4 years ago

      5
      Ola It's great with a browser that is trying to solve the issue with ads on the web AND the issue that publishers needs money to build cool sites.
      Top positive comment  12 months ago

      0
      Not secure at all, based on Chromium as 99% of the browsers. It doesn't get my respect. No differencial, just Chromium + some extensions implemented.
      Top negative comment  almost 2 years ago

      45
      Kedman The best of the best : no ads, very fast, very safe and very free and work with chrome extension
      Positive comment • 5 months ago

      1
      enricoce it's faster, more secure, sync what you want through different platforms, safe.
      Positive comment • 7 months ago

      0
      Their privacy claims go as far as Facebook saying "we don't sell your data". You are tracked by cryptocurrency companies (Uphold & Brave rewards), they can ask for ID card as well. In the end this is just Chromium with a build-in ponzi scheme; slower and less private too.
      Negative comment • 9 months ago

      2
      fast, bulit-in support for tor peer to peer sync, etc.
      Positive comment • 11 months ago

      1
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      7 of 15 comments
    5. Waterfox is a high performance browser based on the Mozilla platform. Made specifically for 64-Bit systems, Waterfox has one thing in mind: speed. What makes Waterfox so fast?
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      Waterfox vs Mozilla Firefox opinions
      Almost everyone thinks Waterfox is a great alternative to Mozilla Firefox.
       all • positive • negative      relevance • date
      Akino 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
      Top positive comment  over 4 years ago

      21
      JohnFastman 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.
      Top positive comment  almost 5 years ago

      14
      Dated when compared to actual Firefox, some extensions doesn't work properly due to it being based on a old version of Firefox.
      Top negative comment  almost 2 years ago

      5
      retroplayeryt It's like the Chromium, but for Firefox.
      Positive comment • 8 months ago

      0
      Schnatt_App clean striped open-source alternative if you seek a browser without any telemetry features
      Positive comment • over 1 year ago

      6
      Please keep it updated quicker vs Firefox. That is my only complaint.
      Positive comment • almost 2 years ago

      1
      khanhlong17112000 The 64 bit version of this browser is very lightweight. In fact, it can compare with 32 bit version of another browser.
      Positive comment • almost 2 years ago

      1
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      7 of 16 comments

    6. Opera

      • Free • Proprietary
      • Mac
      • Windows
      • Linux
      • Windows Mobile
      • Android
      • Symbian S60
      • Blackberry
      • Android Tablet
      • BSD
      • PortableApps.com
      • Kindle Fire
      • ReactOS
      ▼
      ▼
      Opera is an innovative browser that focus on implementing new technologies without dropping simplicity and ease of use, speed and security; supporting and contributing to open web standards.
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      Opera vs Mozilla Firefox opinions
      Some users think Opera is a great alternative to Mozilla Firefox, some don't.
      Speed and low power usage
      Top positive comment  almost 4 years ago

      0
      Firefox is focused on privacy and it is open-source. Opera is closed-source and it is owned by a chinese company.. Not so private...
      Top negative comment  over 2 years ago

      57
      MD98SY The snappiest browser I've ever used. Amazing load and boot times compared to Firefox. it is also faster than Chrome and Vivaldi. I tried almost all the alternatives on this page. and Opera was the fastest.
      Positive comment • about 4 years ago

      -14
      SecurityChecker Opera has so many new features in the new update 42 comes with the new sidebar,new animations and more features and it has a very nice design
      Positive comment • over 4 years ago

      -9
      Innovative features, good extension support, stable
      Positive comment • over 4 years ago

      -8
    8. Chromium is an open-source browser project that aims to build a safer, faster, and more stable way for all users to experience the web. An unofficial portable version of Chromium is available here: http://crportable.sourceforge.net Windows binaries are available at:...
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      Chromium vs Mozilla Firefox opinions
      Almost everyone thinks Chromium is a great alternative to Mozilla Firefox.
      JohnFastman 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.
      Top positive comment  almost 5 years ago

      26
      SiliconeValley Chromium is most likely the heart of Google Chrome, Opera and some browsers without fancy features.
      Top positive comment  about 5 years ago

      4
      Different from Firefox, it doesn't autoupdate on Windows. You need to basically download a new browser per wiki and install... On Linux, it's more easy to manage updates depending on the distros, on Arch Linux/Debian it's so easy, but hard on Ubuntu/Mint.
      Top negative comment  over 1 year ago

      4
      By default, it doesn't support DRM because the missing Widevine plugin/codec
      Negative comment • over 1 year ago

      1
      Chromium doesn't have DRM features and some codecs implemented like Google Chrome, it's open-source but all your data goes to Google when you use Chrome Store to download apps since there is no Chromium store. Also, this browser is hard to install on Windows, you have to compile or download versions that are created by the users daily, so it means you do not have a proper installer like on Linux/BSD.
      Negative comment • over 2 years ago

      18
      Full Webbrowser, Source of Chrome, has html5 / css3 / js / addons / bookmarks / sync, etc. So, why not? It seems there was a Troll on this page...
      Positive comment • about 5 years ago

      0
      jacksarrocco Chromium is not a ready-for-the-consumer software. It is a open source project that needs to be implemented to make it work.
      Negative comment • over 5 years ago

      -77
    9. A free web browser developed by Google from the open source Chromium project with a focus on speed and minimalism.
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      Google Chrome vs Mozilla Firefox opinions
      This alternative is disputed. Google Chrome is still a legitimate alternative to Mozilla Firefox, but it might have issues that some users think are important.
       all • positive • negative      relevance • date
      Do not have as many languages and spell checking support as Firefox do.
      Top negative comment  almost 5 years ago

      76
      Chrome is just a big crap. Google's spyware. Avoid using it at all costs. Bloated, sending your data to Google, spying on you, slow, this is what you get when using Chrome.
      Negative comment • about 1 year ago

      8
      It has a very bad performance compared to Firefox on Linux.
      Negative comment • over 1 year ago

      3
      jsmi6280 Google Chrome just wins performance
      Positive comment • over 1 year ago

      -6
      voreni chrome is cool but is not best alternative for firefox
      Positive comment • over 1 year ago

      -5
      jamiegray Closed source made by Google. Much less trustworthy than open source, made by the non-profit Mozilla
      Negative comment • over 2 years ago

      13
      RemovedUser Google Chrome is the fastest and most secure browser there is. It also has the largest library of extensions and the most support since it is by far the most widely used browser today.
      Positive comment • almost 3 years ago

      -15
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      7 of 20 comments
    10. Firefox Nightly is the development (alpha) release channel of Mozilla Firefox . Firefox Nightly gets a new version every few hours. It offers access to bleeding edge features of the development branch of Firefox before they make a final release.
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      Firefox Nightly vs Mozilla Firefox opinions
      Most users think Firefox Nightly is a great alternative to Mozilla Firefox.
      If you want a more updates and If you are tester, you liked her!
      Positive comment • over 1 year ago

      4
    11. Firefox Developer Edition brings you latest features, fast performance, and the development tools you need to build for the open web. Its powerful development tools will extend your ability to work across multiple platforms from one place.
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      Firefox Developer Edition vs Mozilla Firefox opinions
      Almost everyone thinks Firefox Developer Edition is a great alternative to Mozilla Firefox.
      sarpertoksoz offical edition of firefox
      Positive comment • over 3 years ago

      0
      axy_david If you have issues with Firefox not being fast enough but don't wanna go Chrome try this! Also faster than Chrome.
      Positive comment • almost 4 years ago

      8
    12. Rebuilt from the ground up using Chromium, the new Microsoft Edge brings you world-class compatibility and performance, the security and privacy you deserve, and new features designed to bring you the best of the web.
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      Microsoft Edge vs Mozilla Firefox opinions
      Some users think Microsoft Edge is a great alternative to Mozilla Firefox, some don't.
      Based on Chromium and privacy friendly too, Firefox has no any advantages than Edge.
      Positive comment • 6 months ago

      -4
    Showing 10 of 209 alternatives