I'm using Windows 10 and Firefox 66.
If I use Firefox's "Save Page As..." (ctrl + s) to downlaod a webpage that has more than simple text (i.e., js, css, images etc.), I get a
webpage.htm file as well as a folder called
webpage_data containing the extra resources. In Windows explorer, these look like normal files and folders -- no icon overlays or anything indicating that they behave differently from any other file or folder.
However, If I delete the folder, the file gets deleted as well!
I've never seen files "linked" like this in a Windows filesystem before. What's going on here? Is this something I can replicate with arbitrary files and folders via the file properties dialog?