Running the Jalview JAR in a web browser using webswing

Whilst looking at customisation of FlatLaf (JAL-3416) https://www.formdev.com/flatlaf/ I came across something called webswing https://www.webswing.org/ which purports to run Java swing applications in a web browser:
"Webswing is a web server that allows you to run any Java Swing application inside your web browser, using only pure HTML5."

This worked to a certain extent without much configuration effort and using only the executable jar (obtained with gradle shadowJar). It would probably work from the dist/*.jar files (obtained with gradle makeDist).

Download the BIN .zip file for the latest version (21.1.5 at time of writing) from https://www.webswing.org/downloads .

Unzip that into a dir and cd into it.

Make a dir apps/Jalview and copy the executable jar into it.
Copy a jalview logo png file into the apps/Jalview dir as icon.png.

Add the following section to the (JSON) webswing.config file (this was just a minimally adapted copy of the "/flatlaf" section already there.

  "/jalview" : {
    "path" : "/jalview",
    "webFolder" : "",
    "security" : {
      "module" : "INHERITED",
      "classPath" : [ ]
    },
    "icon" : "${webswing.rootDir}/apps/Jalview/icon.png",
    "langFolder" : "${webswing.configDir}/lang",
    "swingConfig" : {
      "jreExecutable" : "${java.home}/bin/java",
      "javaVersion" : "${java.version}",
      "vmArgs" : "-Xmx128m -DauthorizedUser=${user} -Dwebswing.optimizeCaret=true",
      "classPathEntries" : [ "${webswing.rootDir}/apps/Jalview/*.jar" ],
      "theme" : "Murrine",
      "fontConfig" : { },
      "swingSessionTimeout" : 300,
      "isolatedFs" : true,
      "debug" : true,
      "javaFx" : false,
      "javaFxClassPathEntries" : [ ],
      "directdraw" : true,
      "compositingWinManager" : true,
      "allowDelete" : true,
      "allowDownload" : true,
      "allowAutoDownload" : true,
      "allowUpload" : true,
      "allowJsLink" : true,
      "jsLinkWhitelist" : [ "org.webswing.demo.jslink.JsLinkDemo.*" ],
      "launcherType" : "Desktop",
      "launcherConfig" : {
        "mainClass" : "jalview.bin.Jalview"
      },
      "userDir" : "${user}",
      "transparentFileSave" : true,
      "clearTransferDir" : true,
      "transparentFileOpen" : true,
      "transferDir" : "${user}/upload",
      "homeDir" : "${webswing.rootDir}/apps/Jalview"
    },
    "maxClients" : 100,
    "allowStealSession" : true,
    "name" : "Jalview",
    "autoLogout" : true,
    "sessionMode" : "CONTINUE_FOR_BROWSER",
    "uploadMaxSize" : 5,
    "webHomeDir" : "${webswing.rootDir}/apps/Jalview"
  },

Then run
java -jar webswing-server.war
and then go to http://localhost:8080/jalview/ in a browser.
Log in with user "admin" and password "pwd" and then click on the Jalview icon.

Most obvious failings is titlebar drag and drop/resize of the the internal windows.
However, At least some of the Fetch Sequences work (e.g. from PFAM -- the text box does not appear but you can click on "Example" and then "OK"), and some of the Web Services work (e.g. Alignment -> MafftWS with defaults) without any further configuration or code changes.

Whilst source code is available (to registered users), I don't think this is free-to-use in any production environment. I can't immediately see any pricing on the website.

I don't know if this is of any use, but thought it should be noted.