Well, I finally got Firefox to play MIDI files using a Soundfont of my choice. Previously, I showed How to Make MIDI Files Sound Better in Windows 7. Well, this doesn’t work in Windows 10 mainly because Microsoft removed the MIDI Mapper functionality and the MIDI playing plugins that used to work in Firefox no longer do. Anyway, here’s what I did for Windows 10.
First thing in Firefox is to install the MIDI Player extension by Jazz-Soft. Then, install the Jazz-MIDI extension in Firefox. This is all you do with Firefox itself. The next two items are separate programs that run in Windows. You’ll need to restart Firefox after installing the other programs.
The two items are from CoolSoft. The first in their VirtualMIDISynth program which allows you to choose which Soundfont(s) to use and which MIDI device to play through (more on this later). For now, go ahead and install their MIDIMapper plugin. This is the replacement for the removed Windows MIDI Mapper.Continue reading