The best alternative to Mozilla Firefox is Zen Browser, 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 many of them are so hopefully you can find a suitable replacement. Other interesting alternatives to Mozilla Firefox are Mullvad Browser, Pale Moon, Ladybird and Deta Surf.
Experience a privacy-focused, open-source browser rich with features like vertical tabs, Split View, Zen Glance, and extensive security protocols. Built on Firefox, it's currently in beta, emphasizing privacy and adaptability, with future plans for horizontal tabs.
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The Mullvad Browser is a privacy-focused web browser developed in a collaboration between Mullvad VPN and the Tor Project. It’s designed to minimize tracking and fingerprinting. You could say it’s a Tor Browser to use without the Tor Network.
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This open-source Goanna-based browser for Windows, Linux, Mac, and FreeBSD offers customization, security, and privacy. Forked from Firefox, it's optimized for modern processors, ad-free, and supports unique extensions, community-backed. Comes with a functional status bar, supports NPAPI plugins.
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Ladybird is an open-source web browser currently in development, with an alpha version expected to launch in 2026.
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Workspace fusing browsing, file management, and AI with local-first data; offers note-taking, applet creation, offline media storage, YouTube and PDF interaction, customizable AI-powered notes, citation tools, split views, sidebar navigation, and privacy features.
GermanyEU
Web-browser, advanced e-mail, newsgroup and feed client, IRC chat, and HTML editing in one application. Itis built on the open source Mozilla Gecko engine, the same code which underlies Thunderbird and is the base for the Firefox browser.
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Falkon, formerly QupZilla, is a QtWebEngine based cross-platform web browser.
It aims to be a lightweight web browser available through all major platforms.
Falkon has all standard functions you expect from a web browser. It includes bookmarks, history (both also in sidebar).
GermanyEU
Desktop browser replaces tabs with Spaces, organizing web apps into themed workspaces for efficient switching. Includes command palette, overlay tab switcher, ad blocker, dark mode, Picture-in-Picture, download management, and robust privacy controls without telemetry.
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Iridium Browser is a free, open, and libre browser modification of the Chromium code base, with privacy being enhanced in several key areas.
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Ecosia Browser is the newest product from Ecosia an eco-friendly, fast, ad-free browsing experience that supports reforestation.
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A lightweight browser for Apple silicon Macs using the system WebKit engine, rather than bundling Chromium. It offers top or side tabs, pinned and private tabs, spaces, reading mode, built-in ad and tracker blocking, element hiding, floating video, and saved passwords.
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SRWare Iron, or simply Iron, is a fork of the free and open-source web browser Chromium , of which Google Chrome is a fork of. Iron primarily aims to eliminate usage tracking and other privacy violating...
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