530
Ruleclick
(files.catbox.moe)
Be sure to follow the rule before you head out.
Rule: You must post before you leave.
Not foolproof but you can also make a bookmarklet to unbind the top-level event which can sometimes force right-click to work.
javascript:void(document.oncontextmenu=null);
there's also an extension that can usually bypass anything the site uses to change right click behaviour