You can browse the WSL filesystem from Windows and you can create
a network drive mapping for the WSL filesystem.
If you do this you can simply launch a file with the appropriate
Windows app (e.g. Firefox)by clicking on the WSL file (e.g.
csssubmit.html) from Windows Explorer.
See here <https://winaero.com/blog/access-wsl-linux-files-file-explorer-windows-10/>.