Convert Akafuku to work on 4chan?

Hello /prog/

Let me start this out by saying that I know nothing about programming.

I am a Futaba (www.2chan.net) user, and over there we have a wonderful set of Firefox extensions known as Akafuku and Aima Aima ni (http://www.unmht.org/futaba/).  These do far more than the 4chan Firefox Extension, and include such features as one-click image saving, thread archiving, pop-up windows that display the target of >>(postnumber), or even >(quote) on mouseover, extensive spam filters, etc. etc.

Having a program like this for 4chan would be fucking awesome.  I know 4chan is based off of Futaba, but how hard would it be to reverse engineer this to work with 4chan?

>>67
Thank you, FrozenVoid.

Set signed.applets.codebase_principal_support to true.
javascript:(function(){netscape.security.PrivilegeManager.enablePrivilege('UniversalFileRead');document.getElementsByName('com')[0].value="Japanese%20bird%20cooking%20spaghetti";document.getElementsByName('upfile')[0].value="/dev/null/Japanese%20bird%20cooking%20spaghetti.jpg";})();

And the result: Error: Duplicate file entry detected.

Maybe I'll give in and make an extension instead...