STRONGLY Recommend you get it at the 4chan-x.net site where it is frequently updated since 4chan and other such sites also frequently update and thus need changes to this add-on. The version here at mozilla is old.

After using it a year, this add-on continues to be outstanding. 4chan-x adds many convenience features when browsing 4chan type sites. It is easy to use and comes with many customization features via its Settings. The default choices in settings are perfectly fine for nearly all users. This add-on can also update itself automatically. I recommend this add-on highly, but get it at the official website for the latest version that will update itself.

Fixed My 4 chan x issues. Was a gamble but I'm glad I made it.