Hie,
Yes that command line starts Edge but I dont how to pass the right url. That's depends of the Rapiphp internal start process used and the langage used.
Your proposal to start thru a bat will the same thing: how to pass the right url, in fact we ( the Rapiphp user ) dont know the url, and Rapidphp start a file
file://... not
http://...
So I continue to investigate but I think some extra informations regarding Rapidphp coding/interface is necessary.
I've try your proposal with the same result as you add 'Microsoft-Edge:%1' directly on the select windows of RapidPhp>Options....
Meg