Windows and MacOS: download and run the installer file. Keep pressing <OK> and <Next> until done.
MacOS: depending on your security settings, you may see a warning message...
Linux: run sudo ./Jazz-Plugin-1-5.sh. You may also want to setup a Software Synth.
You may need to restart your browser.
NOTE: Chrome v.43 and later requires the Jazz-MIDI extension in addition to the plugin.
Run npm install -g jazz-midi, or check it at npm.
Post-NPAPI Chrome support. For the best compatibility, please start using Jazz-Plugin via JZZ.js library!