[FIXED] Unable to start Jupyter lab or Jupyter notebook in a browser

Issue

I get the following log when starting Jupyter lab or Jupyter notebook-

[W 17:03:08.963 NotebookApp] No web browser found: could not locate runnable browser.

and Jupyter does not start a browser (or a tab in a browser).

(I am using Linux - Manjaro i3 community edition)

I have configured Jupyter to use google-chrome-stable by

jupyter notebook --generate-config

and setting the following line in ~/.jupyter/jupyter_notebook_config.py

c.NotebookApp.browser = '/usr/bin/google-chrome-stable' 

(Yes I have uncommented the above line)

/usr/bin/google-chrome-stable and google-chrome-stable successfully launch chrome from the terminal.

I have also tried

jupyter lab --browser=google-chrome-stable

jupyter lab --browser google-chrome-stable

without success.

Jupyter used to open in a browser when I had Pale Moon installed on my system, but now that I have removed it, I cannot seem to get this working. google-chrome-stable is my default browser now.

The obvious workaround is to copy the localhost URL to a web browser but I am trying to avoid that.

Solution

Posting dsjamieson's answer here:

You have to give your browser (“google-chrome-stable” in this case) a string format argument (%s) in order to pass it the notebook’s URL:

jupyter lab --browser="google-chrome-stable %s"

or, if you prefer opening chrome in app mode:

jupyter lab --browser="google-chrome-stable --app=%s"

Answered By - double0darbo