04/08/2019: Firefox has been built

After hours of build attempts of both Chromium and Firefox, we have successfully packaged Firefox. Chromium is a story for another time. The build systems for these two browsers border on insanity and their overall size and complexity is paramount.

Firefox requires both GTK2 and GTK3. GTK2 is required only for flash. [1]
Both Chromium and Firefox require nodejs to build.
Both Chromium and Firefox require Python 2.
Both browsers bundle all of their required third-party libraries and they cannot all be set to use the system\'s.
clang is now the default and "supported" compiler of both browsers.
Firefox requires a version of automake which is 18(?) years old. [2] [3]
Firefox requires rust which was painful to package for musl to say the least.
Chromium\'s build scripts require python2 yet call python which points to python3.
A large number of patches were needed for both to support musl.
Both browsers depend on GTK+3 which depends on dbus. This dependency was removed by using a fake atk library.
ALSA audio support is being removed from Firefox. This includes the configure flag to enable it.
This will be updated as I remember things.

Sources: