viper-emacs-state-mode-list

viper-emacs-state-mode-list is a variable defined in `viper.el'.
Its value is

(Custom-mode dired-mode efs-mode tar-mode egg-status-buffer-mode browse-kill-ring-mode recentf-mode recentf-dialog-mode occur-mode mh-folder-mode gnus-group-mode gnus-summary-mode completion-list-mode help-mode Info-mode Buffer-menu-mode compilation-mode rcirc-mode jde-javadoc-checker-report-mode view-mode vm-mode vm-summary-mode)

Documentation:
A list of major modes that should come up in Emacs state.
Normally, Viper would bring buffers up in Emacs state, unless the corresponding
major mode has been placed on `viper-vi-state-mode-list' or
`viper-insert-state-mode-list'. So, don't place a new mode on this list,
unless it is coming up in a wrong Viper state.

You can customize this variable.