using the "save to zotero" button
Few months ago when I was reading an article at the JAMA network opened for me by my institution subscription I was able to add the article including the pdf and all its metadata to my zotero on my computer just only by clicking the save to zotero bookmarklet which I have in Favorites bar. Now this has changed, I have to download the pdf article to my computer first before adding it to Zotero by using the right click over the article reference in my list "Libreria personale". Why this? The previous use of the bookmarklet was easier and time-saving.