Hi! I'm a big fan of this program, but I often read manga online (mostly in the site One Manga).
I have patched archive.py to support URL, and then the URL is "unpacked" as if it was a compressed file. I don't know if it would be a nice feature to implement (I offer myself to code the plugin, although I don't have knowledge of QT bindings to make the UI). It's correct and desirable?
Hey I'm working on the same thing. And it supports Onemanga, check it out https://sourceforge.net/projects/comixpp/ . Maybe we can share some ideas.