There is any way to make the mudfish launcher to launch Vivaldi Browser instead of Edge?
Please run the regedit at C:\Windows\regedit.exe then find the key like FIREFOX.EXE or IEXPLORE.EXE in HKEY_CURRENT_USER/Software/Clients/StartMenuInternet then check HKEY_LOCAL_MACHINE/SOFTWARE/Clients/StartMenuInternet/’‘FIREFOX.EXE’‘/shell/open/command