Mitchell Hentges d7f6252622 Bug 1750874: Support launching Mach with py instead of python r=glandium
When installing from Python.org, the `python` command isn't available by
default (in favour of `py`). Support using `py` instead.

There were issues running `hg` when `python` isn't added to the `PATH`,
so the docs are being updated accordingly.
Of course, it's still worth supporting `py`-instead-of-`python`
workflows for `git` users who won't be impacted by that bug.

Differential Revision: https://phabricator.services.mozilla.com/D136286
2022-01-21 18:22:58 +00:00

An explanation of the Firefox Source Code Directory Structure and links to
project pages with documentation can be found at:

    https://firefox-source-docs.mozilla.org/contributing/directory_structure.html

For information on how to build Firefox from the source code and create the patch see:

    https://firefox-source-docs.mozilla.org/contributing/contribution_quickref.html

If you have a question about developing Firefox, and can't find the solution
on https://firefox-source-docs.mozilla.org/, you can try asking your question on Matrix at chat.mozilla.org in `Introduction` (https://chat.mozilla.org/#/room/#introduction:mozilla.org) channel.


Nightly development builds can be downloaded from:

    https://archive.mozilla.org/pub/firefox/nightly/latest-mozilla-central/
            - or -
    https://www.mozilla.org/firefox/channel/desktop/#nightly

Keep in mind that nightly builds, which are used by Firefox developers for
testing, may be buggy.
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