MuPDF a lightweight PDF and XPS viewer that can quickly open large PDF documents even on slow computers.
Since the app focuses on speed and small code size, it does not have interactive features such as form filling. It is also worth noting that the UI displays only the PDF document: to navigate (next page, rotate, zoom, text search, go to the page and so on), you should use keyboard shortcuts.
MuPDF also comes with some tools (in the package “mupdf-tools“) that allow you to convert a PDF file into a series of images (pdfdraw), to repair, decrypt, and decompress PDF files (pdfclean), and some debugging tools that allow you to extract fonts from PDFs, to display information about the internal objects and so on (pdfshow, pdfextract and pdfinfo).
Installation into Linux Mint: