Hi,
I feel a little stupid but i can find a way to do that anymore.
I have a fully fledged application that i install on my web server. I can use the AppManager/WebIDE to load the app on my FirefoxOS device or emulator, but i cannot execute it as a Firefox Desktop app.
As far as i remember, it used to be that as long as the web server served the app manifest with a Content-Type application/x-web-app-manifest+json, Firefox understood this was an app to be installed or updated. Now, it just asks me to save the file.
I read things about a webapprt application, but this doesn't seem to work and i can't find up-to-date documentation on this.
For information, the app manifest is located at
https://app-21-mwa-vc-as-en.jocly.com/jocly.webapp with the entry point at
https://app-21-mwa-vc-as-en.jocly.com/index.html
Thanks for your help.