SOPA has not yet passed, it is not yet the law and I hope that Mozilla leaves it up for now. The DeSOPA program is meant to discourage passage of the bill by showing congress how easily it can be circumvented, so if it is removed after passage so be it. The link is:
I didn't mean at all to imply Mozilla would be taking it down; just that the government wasn't happy with the mafiaafire add-on and has included text in SOPA specifically targeted at making add-ons like this "illegal". Just another reason SOPA is bad :)
https://addons.mozilla.org/en-US/firefox/addon/desopa/
or
[add-ons mozilla base URL ] (slash) en-US (slash) firefox (slash) addon (slash) desopa (slash optional)
in case it is filtered.
Disclaimer: I developed it