Sidekick Browser

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Opera Beta

Otter Browser is a cross-platform, free and open-source web browser that is designed to be very modular. With Otter Browser, the user can replace whole bookmarks manager or history viewer by the use of plugins and the built-in abstraction layer. The browser is built with the Qt WebEngine as a wrapper around Chromium and released under the GPLv3 and is available for Linux, macOS, and Windows platforms.

Sandcat is a free and open-source browser designed for penetration testers and is used for testing security holes and bugs in websites and web applicaitons. The Sandcat Browser is developed by Syshunt on top of Chromium and uses the Lua programming language to provide extensions and scripting support. Although the browser is directed towards system administrators and penetration testers, it can be useful for people who want to verify in real-time how they are tracked online.

Lucid Browser is a free and open source mobile web browser designed to be lightweight, fast, and simple. The application is designed for quick start-ups and simplistic, while still providing features seen in other popular mobile web browser.Lucid Browser is available for Android and weighs in at only 4MB in total.

With Opera Developer Browser you can join in on the earliest experiments for the browser. The browser is recommended to be used by developers, enthusiasts and advanced users. Opera Developer Browser and Opera Beta Browser was introduced to improve the development cycle of the browser and to beta tests new version before final release, to the public.

As a developer you will love Firefox Developer Edition! It is a blazing fast browser that includes the latest development tools such as support for CSS grid debugging, CSS shape path editor, the variable fonts inspector, and many other features. Firefox Developer Edition is also handled as a separate profile compared to your regular Firefox setup, so you don't have to worry that your Firefox Developer Edition settings will affect your regular browsing experience. As a developer the Firefox Developer Edition browser is a must have.

Chromium is a free and open source web browser developed by Google. The project builds the open source version of the Google Chrome web browser. Google make use of the source code to build and improve their proprietary version of Google Chrome. And Google is not alone, many other browsers like Microsoft Edge, Opera and others a based on Chromium.