e3a8bf0d84
Prefs can be set with `./mach run --setpref foo=bar` or in the ~/.mozbuild/machrc file as: [runprefs] foo=bar MozReview-Commit-ID: HO3tdFi9ffi
==== mach ==== Mach (German for *do*) is a generic command dispatcher for the command line. To use mach, you install the mach core (a Python package), create an executable *driver* script (named whatever you want), and write mach commands. When the *driver* is executed, mach dispatches to the requested command handler automatically. To learn more, read the docs in ``docs/``.