If you're on Firefox, then the friend request system won't work; you'll have to switch to another browser to complete the request.
FAQ, Tutorials, and More!(Updated 21/4)
Q: I can't edit posts/use quick reply/edit my friend list! What's up with that?
A: These features do not work properly in the Mozilla Firefox browser. Editing can be done by right clicking the "Edit" button and selecting "open in new tab". To use the other features, you must switch to another browser.