Password-protected CBZ / CBR files can be opened (#95). The password dialog has a Show password checkbox.
Tips on the home page
The home page shows a random tip with clickable links and keyboard shortcuts. Double-click the tip to see another one. Turn tips off with the ShowTips setting (#5515).
Manga mode and outline for all formats
Toggle Manga Mode works for PDF and other document types, not only comic books (#5498). Show Document Bookmarks (CmdDocumentShowOutline) works for every format that has a table of contents.