Man pages matching name http::cookiemonster::cookie in section 3pm:

HTTP::CookieMonster::Cookie.3pm.en	debian 10 / libhttp-cookiemonster-perl
HTTP::CookieMonster::Cookie.3pm.en	debian 11 / libhttp-cookiemonster-perl
HTTP::CookieMonster::Cookie.3pm.en	debian 12 / libhttp-cookiemonster-perl