If the page being annotated is already a local file, then SingleFile should save back to that file instead of making a new file in the Downloads folder.

This would be useful when re-annotating a file you've already saved.

Edit 1: There is an option "File name > filename conflict resolution" but this provides no way to save to the original file except by renavigating the whole path to the original html source file, and re-specifying the filename.

What I'm asking for is that SingleFile literally saves back to the original source html file (possibly with an overwrite warning for safety, although I would be happier without that).

Edit 2: disabling the option "File name > open the "Save as" dialog to confirm the file name" doesn't affect this problem; the file is still written to the Downloads directory instead of its original location.