When opening an already-saved page, is it possible to extract its file location?

[XMB-7]

Before & after saving a page with the annotation editor, I always need to change its content, take some notes, have it renamed and move it to a new location, let's say, from ~/downloads to ~/snapshots.
Later on, when I open the local file and try to make some new changes on it, the upcoming saving process can be really overwhelming. Currently it would just create a new file with the original name determined by the filename template in ~/downloads instead of overwriting the existed one in ~/snapshots, so I have to enable the Save as prompt to hand-select the correct target file to overwrite every time.
So I wonder if SingleFile can detect the location of the local file being opened and use it for automatic overwriting?