Jupyter uses wrong browser

[Brendan Barnwell]

I'm on Linux Mint.  I have Vivaldi set as my default browser.  If in my environment I start Python, import the webbrowser module, and use webbrowser.get().open('blah') it opens in Vivaldi.  Nonetheless, if I do "jupyter notebook", it opens in Waterfox.

How can I make Jupyter use the correct default browser?

Please note, I am NOT asking how to set the browser used by Jupyter.  I know about the c.NotebookApp.browser variable in Jupyter config and I don't want to do that, because I don't want Jupyter to have a custom browser setting.  I am asking how to get Jupyter to correctly use the DEFAULT browser that is already set, so that if I change my default browser, Jupyter will also change to use the new default.

[Roland Weber]

Are you running "jupyter notebook" from the same environment in which you did the test with the webbrowser module? If it is a different environment (conda?), compare the environment variable BROWSER in both.

cheers,

  Roland

[Thomas Kluyver]

To add to that, Jupyter uses the webbrowser module to launch your browser. Here it is in the code:

https://github.com/jupyter/notebook/blob/31c2184d011e2a6b78d02f6039f0da4273a2cfb5/notebook/notebookapp.py#L1732

So if you're seeing different behaviour from calling webbrowser.get() yourself, it can only really be because of a difference in the environment, or because you have configured NotebookApp.browser.

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