>>106128719Forgot the old repo is no longer active. Here: https://pdftools.wiki/
Emacs is the best document viewer. I don't use anything else now because it has bookmarks and can handle all file types. Can also reference them directly in org-mode documents. I also read manga in emacs. It works by default of course but I wrote a small major mode to render and navigate through them similar to nov.el. Still waiting on it to be accepted in melpa/elpa though (going on 3 months).
Everything else pulls in a ton of dependencies or is not as good as was I get from emacs. I use gtk2 emacs and my config works over every OS the same. I even get dark mode natively for pdf files which was a pain to setup in anything else.
Whatever you do avoid calibre like the plague. It's inferior to emacs in every way for epubs and manga. It tries to pull in all manner of cancer like dbus for no reason. Truly horrible software.