I think that I’ve found the cure to make “View in Browser” and “Save As HMTL” work from the Radio File menu.
Here are the changes I made. Be aware, until Jake checks these out I can’t guarantee your results. But it works for me.
Make the following changes.
In Frontier.tools.windowTypes.commands.saveAsHtml you need to add this line.

  local (pta = html.setPageTableAddress(@websites.["#data"]))

I put it in the very beginning of the script.
In Frontier.tools.data.windowTypes.outlinerFile.saveAsHtml you change this line in the renderOutline handler
From:

  if string (adrOutline) contains "" //rules?

To:

  if string (adrOutline^) contains "" //rules?

I think those are all the changes I made and now “View in Browser” and “Save As HTML” both work for me.