The command line support in Minidump Browser is very simple.
/minidump
The /minidump command takes one argument, a filename.
/minidump c:\windows\minidumps\crash.dmp
minidumpBrowser.exe /minidump c:\windows\minidumps\crash.dmp
minidumpBrowser_x64.exe /minidump c:\windows\minidumps\crash.dmp
The above command line will display the file c:\windows\minidumps\crash.dmp in Minidump Browser.