I just set chrome as my default browser and jupyter launches in Chrome now.
However, we have also the following approach, but it did not work for me:
"CONDA version 4.7.5 and jupyter 6.0.0. - Windows 10"
1) Open Anaconda and launch your environment in terminal
2) Create config file and open file in notepad
3) Modify line of NotebookApp with chrome and save modification
4) Launch Jupyter
:( ... but it still launches in Mozilla.