There are some compatibility issues with the djvu and the comic plugins,
https://www.mobileread.com/forums/sho...t=75348&page=5
at some stage I thought they were resolved, but in the end I am not really sure about that. Since for me the djvu plugin is essential, I have not installed the comic viewer plugin. I would be interested to hear if anybody gets both djvu and comic viewer working together simultaneously.
Also, at least for me the fb2 reader seemed to work less well than the latest FBReader, so I have not installed it.