b2gpopulate is a tool to populate a Firefox OS device with content.
Your device must be running a build of Firefox OS with Marionette enabled.
Installation is simple:
pip install b2gpopulate
If you anticipate modifying b2gpopulate, you can instead:
git clone git://github.com/mozilla/b2gpopulate.git
cd b2gpopulate
python setup.py develop
For full usage details run b2gpopulate --help.