Using a html in /tmp to open the browser does not work with snap-installed firefox

[johann-petrak]

Just running voila somefile.ipynb will show a 404 file not found error if the default browser is e.g. a snap installed Firefox on Linux (e.g. Ubuntu), but this will happen with any browser which sandboxes /tmp

The easiest solution would be to add an option that allows the html file that is created to be created in some directory which is visible in the browser, e.g. the current directory.
Alternately it should be possible to simply have voila open the URL where voila is running which should always work.

• voila version 0.5.8
• Operating System and version: Ubuntu 24.04
• Browser and version: Firefox 132.0.1 installed via snap