When i switch on "URL on client" (to open url on client side), URLONCLIENT.EXE is placed on default app used BUT after some restart , windows 10 put EDGE back.
I have tried this work around:
0) install firefox
1) choose firefox for default app
2) rename firefox.exe
3) copy urlonclient.exe(and bin file) on firefox directory
4) rename urlonclient.exe in firefox.exe
---Its work but after some reboot, windows 10 switch back edge---

Thanks.