SeaMonkey is described as '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' and is a very popular Web Browser in the web browsers category. There are more than 100 alternatives to SeaMonkey for a variety of platforms, including Windows, Linux, Mac, Android and iPhone apps. The best SeaMonkey alternative is Mozilla Firefox, which is both free and Open Source. Other great apps like SeaMonkey are Thunderbird, Brave, Google Chrome and Vivaldi.
Chromium-based web browser for Windows, macOS, Linux, iOS, and Android with Chrome extension support, smart security, privacy tools, syncing of history and bookmarks, immersive reader, PDF tools, Collections for organizing content, and customizable new tab layouts.
Ladybird is an open-source web browser currently in development, with an alpha version expected to launch in 2026.
Browser using the Gecko layout engine to render web pages, which implements current and anticipated web standards.
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.
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.
The best browser for your Mac is the one that comes with your Mac. Safari is faster and more energy efficient than other browsers. Handy tools help you save, find, and share your favorite sites. Built-in privacy features help keep your browsing your business.
Firefox Focus is the Mozilla-made browser that considers your privacy first and foremost. By default, it blocks ad-trackers and it helps keep things secure by providing easy ways to clear your browsing history, including passwords and cookies.
Lightweight browser focused on privacy with ad and tracker blocking, integrated VPN and Tor browsing, customizable appearance modes, workspace management for tab organization, support for Windows, macOS, Linux, Android, iOS, and seamless content syncing.
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).
WebKit-based privacy browser supporting Chrome and Firefox extensions, zero telemetry, built-in ad-blocker, anti-tracking for enhanced privacy, native macOS and iOS integration, lightweight performance, battery-saving technology, and a streamlined browsing experience.
Gnuzilla is the GNU version of the Mozilla suite, and GNU IceCat is the GNU version of the Mozilla Firefox browser. Its main advantage is an ethical one: it is entirely free software.
Privacy and security enhanced releases of Chromium for GrapheneOS. Vanadium provides the WebView and standard user-facing browser on GrapheneOS.
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