gistfile1.txt

➜  mozilla-central  ./mach bootstrap

Please choose the version of Firefox you want to build:
1. Firefox for Desktop
2. Firefox for Android
Your choice:
1

Looks like you have Homebrew installed. We will install all required packages via Homebrew.

Your version of Mercurial (3.2.1) is sufficiently modern.
Your version of Python (2.7.8) is new enough.

Your system should be ready to build Firefox for Desktop! If you have not already,
obtain a copy of the source code by running:

    hg clone https://hg.mozilla.org/mozilla-central

Or, if you prefer Git:

    git clone https://git.mozilla.org/integration/gecko-dev.git