Doesn't open oxps file
Tried to open an oxps file with this configuration and got nothing:
girara 0.3.0 (runtime: 0.3.0)
(plugin) pdf-mupdf (0.3.3) (/usr/lib/zathura/libpdf-mupdf.so)
(plugin) ps (0.2.6) (/usr/lib/zathura/libps.so)
(plugin) djvu (0.2.8) (/usr/lib/zathura/libdjvu.so)