Here's the problem:

I recently upgraded to firefox 4, only to find out it was fucking horrible in every single fucking way.

I downgraded back to 3.6, but now the 4chan extension has stopped working because it's incompatible with 3.6. I have looked all over the internet for an older, compatible version, but there isn't one.

Do you dudes know of a way to either make the 4-whatever version work with 3.6, or got a link for a previous version?