This is the source code for the Pale Moon web browser, an independent browser derived from Firefox/Mozilla community code. The source tree is laid out in a "comm-central" style configuration where only the code specific to Pale Moon is kept in this repository.
The shared Unified XUL Platform source code is referenced here as a git submodule contained in the platform/ directory and is required to build the application.
git submodule init && git submodule update