Hi,
thank you so much for looking into this!
I am on 2.8.2. I changed that snippet I quoted from the ‘download.php’ to “inline,” and that fixes it for my very limited use case. I would like to be able to update the plugin without losing this behavior though. The HTML files I am using are rather big (8-11 MB); maybe that makes a difference?
Before making that change to the code, the HTTP response header showed Content-Disposition: attachment, [...]
I am not able to make a screencast easily, please let me know if I can provide further details.