It is possible to view images (at least JPEG) while browsing Files in fossil ui, but I could not find a way to view or download other binary files, such as pdf and other popular formats. Is there a magic switch somewhere? Is it possible at all?
Of binary files, I think only images can be viewed via the web UI by default. If you know how to display a certain type of file in a browser (like, say, PDFs using pdf.js), you could adapt the skin to add this using Javascript.
All files in the repository can be downloaded, whether they’re binary or not: just use the ‘Download’ button at the top of the artifact page.