[org] open PDF files in Emacs

init.org

@@ -2455,16 +2455,9 @@ SLIME opens CLHS links in Firefox, but I'd rather open them in Tor Browser; Tor
           (add-to-list 'org-file-apps pair))
         '(("txt" . emacs)
           ("org" . emacs)
-          ;; ("pdf" . zathura)
+          ("pdf" . emacs)
           ("\\(?:gif\\|jpe?g\\|png\\)" . "sxiv -f %s")
           ;; (t . "xdg-open %s")
-
-          ("pdf" . system)
-          ;; ("pdf" . "zathura %s")
-          ;; (auto-mode . emacs)
-          ;; (system . "xdg-open %s")
-          (system . "zathura %s")
-          ;; (t . system)
           ))
   (setq org-todo-keywords '((sequence "TODO" "RESEARCH" "STARTED" "DONE"))
         org-image-actual-width 400