Is there a way to pass arguments to the entries in the default applications options in KDE Plasma system settings? I want to list my webmail as the email client which means passing a URL to LibreWolf but it doesn’t seem to accept anything.
As a bonus follow-on question: The entries in default applications seem to be stored in ~/.config/mimeapps.list which list .desktop files. Can arguments be passed to a .desktop launcher or would I have to create a new .desktop launcher specifically for webmail within LibreWolf?
I think you need to create a new .desktop file and consider LibreWolf and the URL of your webmail to form the “program”.
Actually LibreWolf might be able to do this for you.
A lot of browsers have an action to turn the current website into a “web app”, meaning they create a shortcut (.desktop file) which runs them on the URL they are currently showing.
You could then make this “web app” your association for mail