> Web browsers have mostly switched over to using pdf.js to render PDFs, which is completely satisfactory for documents that consist of text or images (like sca

> Web browsers have mostly switched over to using pdf.js to render PDFs, which is completely satisfactory for documents that consist of text or images (like scanned documents) Except pdf.js is not satisfactory. Every now and then I come across a PDF file where text is invisible, because Firefox uses a blank font instead of an external font.