welcome to the notepad++ community, @Leo-de-Vetten
you will need a little guide, because microsoft edge is a bit tricky.
it can not be launched directly by running microsoftedge.exe "path_to\yourfile.html" as it is done using internet explorer, firefox and chrome.
instead we will have to make shell api calls.
but that’s not difficult, once you’ve read this guide.
step by step guide - how to add “launch in edge” to notepad++:
open the folder %AppData%\Notepad++\ in explorer
find the file shortcuts.xml and open it in notepad++ for editing.
copy the following line and paste (insert) it anywhere inside the <UserDefinedCommands>section
<Command name="Launch in Edge" Ctrl="yes" Alt="yes" Shift="yes" Key="69"> shell:Appsfolder\Microsoft.MicrosoftEdge_8wekyb3d8bbwe!MicrosoftEdge $(FULL_CURRENT_PATH)</Command>
now your shortcuts.xml should look like the screenshot below (plus your ie and other user defined commands):
Imgur
save shortcuts.xml and restart notepad++
(exit and reopen notepad++ to activate your shortcut changes to the run menu)
if you now run “launch in edge” on any file, edge will open and display it, as seen at the screenshot below:
Imgur
note: you can also use the keyboard shortcut ctrl+alt+shift+eto launch edge with your file
good luck and happy html coding 😉👍