JavaScript | What is the location of the saved ZIP when running viewHome(url, params)?

[omrico]

I have a ZIP file residing in some remote HTTP file server.

When I run viewHome(url, params) in my JS file, the function downloads the file from the remote server, the progress bar fills the house is shown and everything seems fine.

I'd like to know where is the file saved in my PC?
The reason I ask is that if I refresh my web-page I'd like to reload the existing file locally if possible and don't download it again.

I am using Ubuntu 16.4 64-bit with Chrome Version 63 (Official Build) (64-bit).

[Puybaret]

I have no idea. The file is downloaded and managed by the browser, so it's probably in its cache.