"-no-deelevate" as user_pref() ? For PortableApps Firefox?

As you know it is NOT possible (any more) to drag & drop URLs from Firefox to Windows Explorer in newer Firefox any more.

As a solution serves the commandline flag "-no-deelevate".

So when users call

D:\tools\firefox.exe -no-deelevate

Drag & Drop is possible again.

Ok, now I installed Firefox Portable from PortableApps:

https://portableapps.com/de/apps/intern ... x_portable

Here users do not call firefox.exe directly.
Instead FirefoxPortable.exe is launched which in turn calls indirectly in a second step the actual firefox.exe

Unfortunately

D:\tools\FFPortable\FirefoxPortable.exe -no-deelevate

does NOT pass/forward the "-no-deelevate" flag to firefox.exe

Hmm. Is there a workaround?

How can I force FirefoxPortable to pass -no-deelevate to firefox.exe?

Is there a user_pref() in about:config which sets the flag accordingly?