I did not success to configure the plugin (firefox Quantum), even when declaring the exact markdown complete URL as allowed. Firefox is still proposing for downloading the file, instead of displaying it.
Either the configuration is too complicated to perform (or too complicated for me) or the module does not work.
Currently access to file:// URLs is not supported! For the rest of the configuration you can watch this short screencast (only 3 min - no sound): https://youtu.be/c7Lb_Y092ok
