The best open source alternative to Internet Explorer is Mozilla Firefox. If that doesn't suit you, our users have ranked more than 50 alternatives to Internet Explorer and many of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Internet Explorer are Chromium, Firefox Developer Edition, Pale Moon and SeaMonkey.
Web browser by Mozilla with Gecko and WebKit engines. Offers tabbed browsing, HTML add-ons, Enhanced Tracking Protection, cross-device syncing, and privacy customization. Includes tools for developers and a 'Facebook Container' extension.
Open-source browser project offering strong security, fast performance, and stability with broad support for Windows, macOS, Linux, and Android, extensive customization, frequent security updates, minimal default tracking, and foundation for multiple browsers.
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.
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.
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.
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).
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.
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.
GNOME Web is the web browser for the GNOME desktop, based on the popular WebKit engine. It offers a simple, clean, beautiful view of the Web featuring first-class GNOME desktop integration. Its code name is Epiphany.
Iridium Browser is a free, open, and libre browser modification of the Chromium code base, with privacy being enhanced in several key areas.
K-Meleon is an extremely fast, customizable, lightweight web browser based on the Gecko layout engine developed by Mozilla which is also used by Firefox. K-Meleon is free, open source software released under the GNU General Public License and is designed specifically for...
NetSurf is a free, open source web browser. It is written in C and released under the GNU Public Licence version 2. NetSurf has its own layout and rendering engine entirely written from scratch. It is small and capable.
United States
Sweden
EU
Germany
Chile
France
United Kingdom
More features, more customizable, more platforms, and open source.