/usr/lib/python2.7/dist-packages/jupyter_core/tests/dotipython/profile_default/ipython_notebook_config.py is in python-jupyter-core 4.4.0-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 | c.NotebookApp.open_browser = False
|