Steam Community Market not working with HTTPS Everywhere
Posted about it here:
http://steamcommunity.com/discussions/forum/10/46476145046656316/
Basically the "Recent Activity" section of the page just displays "Waiting for new activity" instead of populating. Additionally when you've made a buy order and want to cancel it, the cancel button does not do anything.
Both of these problems disappear with the extension disabled.
Trac:
Username: Ackis
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information