Fennec F-Droid is described as 'Browser using the Gecko layout engine to render web pages, which implements current and anticipated web standards' and is an app in the Web Browsers category. There are more than 100 alternatives to Fennec F-Droid for a variety of platforms, including Windows, Mac, Android, Linux and Android Tablet. The best alternative is Mozilla Firefox, which is both free and Open Source. Other great apps like Fennec F-Droid are Google Chrome (Free), Brave (Free, Open Source), Tor Browser (Free, Open Source) and Vivaldi (Free, Open Source).
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.
An actively developped, keyboard-focused browser with a minimal GUI, inspired by other browsers/addons like dwb and Vimperator/Pentadactyl. It’s based on Python, PyQt5 and QtWebKit and free software, licensed under the GPL.