Cookies are usually small text files, given ID tags that are stored on your computer's browser data.
Cookies are created when you use PXIMG that allow you to stay logged in and provide protection to both you as a user, and to the site.
Cookies on PXIMG:
|Service||Cookie name(s) used||Purpose|
|PXIMG||PHPSESSID||Allows you to be logged in, no details are logged.|
|Cloudflare||__cfduid||Part of Cloudflare to make sure there's no DDoS attacks, etc.|
Modern browsers will allow you to disable cookies per site using via their options/preferences settings, the following links detail the available cookie settings for all major browsers:
Cookie settings in Internet Explorer
Cookie settings in Firefox
Cookie settings in Chrome
Cookie settings in Safari web and iOS