Firefox ESR is described as 'Mozilla Firefox Extended Support Release is a community-led project that allows organizations to benefit from the speed, flexibility and security of Firefox while getting the support they need' and is a Web Browser in the Web Browsers category. There are more than 10 alternatives to Firefox ESR for a variety of platforms, including Linux, Windows, Mac, BSD and Android. The best alternative is Mozilla Firefox, which is both free and Open Source. Other great apps like Firefox ESR are Chromium (Free, Open Source), Pale Moon (Free, Open Source), Firefox Developer Edition (Free, Open Source) and Ungoogled Chromium (Free, Open Source).
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:...
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!.
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.
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.
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.