Albus Luna is a Classic Firefox (tm) work-alike based on a well-known Firefox (tm) fork named PaleMoon (tm).

PaleMoon (tm) — is dis­tri­bu­ted under unusually re­stric­tive terms and con­di­tions. AlbusLuna is a far more open project.

Albus Luna is, in short, a work­ing pre-Quantum Classic Firefox (tm) fork that you can mod­i­fy largely as you wish.

As of 2025, AlbusLuna is the only non-End of Life browser of this type. PaleMoon did the hard work, but it was a walled garden.

A re­la­ted goal is assemble a few of the best XUL ex­ten­sions from the past 10 to 20 years and to ship them with Albus Luna. In some cases, the ex­ten­sions will be pre-in­stall­ed and in other cases they'll be avail­able but not in­stall­ed.

The browser comes with uBlock Origin, ScrapBook X, and Saved Password Editor pre-in­stall­ed and more ex­ten­sions will be add­ed.

The UXP Browser Bundle features Albus Luna and sever­al other XUL-friendly and non-Rust pro­grams in one simple-to-build source tree:

Classic Firefox — As Albus Luna
Newer Firefox — As Basilisk aka Serpent or Snake
Seamonkey — As Blue Gorilla
Thunderbird — As Icedove and Epyrus
Chatzilla — As Ambassador

Unpack the source tarball, install a few de­pen­den­cies, and run a single “bash” script. 4 hours later — de­pend­ing on hardware — you're Mozilla'd up with 6 Mozilla pro­grams that include XUL sup­port and no need for Rust.

It's never been this easy to fill your distro to burst­ing with pre-Quantum non-Rust Mozilla soft­ware. XUL Forever is the endeavour.

Here are the links:

For build documentation, read: uxp-browsers.txt

For the change-log, read: changes.txt

The latest source tarball is here:
uxp-browsers.tar.bz2

The latter source tarball corresponds to the latest — PaleMoon (tm) — git snapshot as of March 06, 2025.

Warning: The tarball is 300MB in size.