Moonchild productions have decided to refork their Basilisk browser code in form of the Firefox 52 Esr Base code, as their first attempt using a code beyond FX 52 was impossible to use for their reasons because of all the new code (Rust and so on) was too hard to remove.

https://github.com/MoonchildProductions/UXP - the new repository of Basilisk new

UXP will be also coming to Pale Moon - The old V24 based UI with a more modern engine behind.

But there is a big issue:

TLS 1.3 can not be implemented because Mozilla did a rewrite of NSS in a newer version of Visual Studio and Pale Moon and Basilisk, being created with an older variant of that program are so far not compatible with the requirements for TLS 1.3 related files and a work-around must be found.. if it is possible at all, which is yet highly unsure.

What is present since the first release of the new fork-point:

http://basilisk-browser.org/releasenotes.shtml