(Ungoogled Chromium) downloads PDF twice if you view it first

I cannot believe how stupid Chromium is considering it’s the king of browsers from a US tech giant. It’s another bug that should be embarrassing for Google.

If you visit a PDF, it fetches the PDF and launches pdf.js as expected. If you use the download button within pdf.js, you would expect it to simply copy the already fetched PDF from the cache to the download folder. But no.. the stupid thing goes out on the WAN and redownloads the whole document from the beginning.

I always suspected this, but it became obvious when I recently fetched a 20mb PDF from a slow server. It struggled for a while to get the whole thing just for viewing. Then after clicking to download within pdf.js, it was crawling again from 1% progress.

What a stupid waste of bandwidth, energy and time.