Free and functional browser from the developers of Pale Moon, which is a completely independent version of the code Mozilla / Firefox. There is support for all necessary functions and web standards, including CSS3 / HTML5, downloadable fonts, etc.
Basilisk is a free, modern and functional open source XUL-based browser that offers the interface and functionality of Firefox. This web browser is based on the Goanna engine (a branch of Gecko) and is built on a unified platform XUL (UXP), which, in turn, is a separate Mozilla branch without Servo and Rust.
Features of the application:
Support for all NPAPI plugins (Unity, Silverlight, Flash, Java, authentication plugins, etc.).
Support for XUL / Overlay extensions in the style of Mozilla.
Experimental support for WebExtensions (in gecko-target mode). Please note that some Mozilla specific WebExtension APIs are not yet available.
ALSA support in Linux.
WebAssembly support (WASM).
Support for advanced graphite font formatting functions.
Support for modern network cryptography: up to TLS 1.3, modern ciphers, HSTS, etc.