test.cjson

{
  "openInExternalApp.openMapper": [
    {
      // represent file extension name
      "extensionName": "html",
      // the external applications to open the file which extension name is html
      "apps": [
        // openCommand can be shell command or the complete executable application path
        // title will be shown in the drop list if there are several apps
        {
          "title": "chrome",
          // On MacOS, openCommand should be 'Google Chrome.app'
          "openCommand": "C:\\Program Files (x86)\\Google\\Chrome\\Application\\chrome.exe"
        },
        {
          "title": "firefox",
          // On MacOS, openCommand should be 'Firefox Developer Edition.app'
          "openCommand": "C:\\Program Files\\Firefox Developer Edition\\firefox.exe",
          // open in firefox under private mode
          "args": [
            "-private-window"
          ]
        }
      ]
    },
    {
      "extensionName": "tsx",
      // apps can be Object array or just the command you can access from shell
      "apps": "code"
    },
    {
      "extensionName": "psd",
      "apps": "/path/to/photoshop.exe"
    },
    // like code-runner, you can custom the shell command to open with file
    {
      "extensionName": "ts",
      "apps": [
        {
          "title": "run ts file",
          "shellCommand": "ts-node ${file}"
        }
      ]
    },
    {
      // shared config, details here: https://github.com/tjx666/open-in-external-app/issues/45
      "extensionName": "__ALL__",
      "apps": "MacVim"
    }
  ]
}