jupyter notebook No web browser found

jalal@klein:~$ jupyter nbextension enable --py fileupload

Enabling notebook extension fileupload/extension...
      - Validating: OK
jalal@klein:~$
jalal@klein:~$ jupyter notebook
/usr/local/lib/python2.7/dist-packages/IPython/paths.py:62: UserWarning: IPython dir '/home/jalal/.ipython' is not a writable location, using a temp directory.
  " using a temp directory.".format(ipdir))
[I 14:45:58.990 NotebookApp] Serving notebooks from local directory: /home/jalal
[I 14:45:58.990 NotebookApp] 0 active kernels
[I 14:45:58.990 NotebookApp] The Jupyter Notebook is running at: http://localhost:8888/
[I 14:45:58.990 NotebookApp] Use Control-C to stop this server and shut down all kernels (twice to skip confirmation).
[W 14:45:58.991 NotebookApp] No web browser found: could not locate runnable browser.