Firefox has a built-in PDF viewer and opens most PDF in it by default: https://support.mozilla.org/en-US/kb/view-pdf-files-firefox
When a PDF is open in Firefox’s PDF viewer, clicking on the clipper has no effect. The clipper should allow me to add the PDF in one of my databases. Today I have to download the PDF and add it in the database. This extra step is a bit annoying and fill my download folder.
