1. Go to: https://forums.e-hentai.org/index.php?act=Login

2. Get a cookie editor, such as Cookies Manager+ (found here: https://addons.mozilla.org/en-US/firefox/addon/cookies-manager-plus/?src=search)

3. Log into e-hentai forums & edit 3 cookies from .e-hentai.org domain:

ipb_member_id

ipb_pass_hash

ipb_session_id

Change the domain in each cookie from .e-hentai.org to .exhentai.org & Save as new.

Session cookies from e-hentai are copied over to exhentai thus exhentai becomes browse-able.