The copy-and-paste method is confirmed. Also, I did ctrl+A (select all) to highlight everything in PDF, which displays blue background color. But it actually shows everything in PDF when using ctrl+A.
Edit. For those who wish to download the PDF file faster, go to https://pastebin.com/VHiDdX3V. The official PDF file download at the Court's website is very slow. https://pastebin.com/VHiDdX3V downloads the PDF files faster. (Just copy the PDF's URL you're interested in and paste it into your browser's address bar.)
Thanks just downloaded them all. If anyone wants to do it easily, use wget, make a text file of all the URLs (copy, paste), and then type in the command line "wget -i yourfilename.txt" I was able to get them all in under a minute.