i found this on wiki
Lawsuits
Yahoo! filed a lawsuit against Xfire, Inc. on January 28, 2005, claiming Xfire has infringed Yahoo!'s U.S. Patent No. 6,699,125, for a "Game server for use in connection with a messenger server". Xfire, Inc. filed a countersuit against Yahoo! on March 10, 2005. The countersuit was eventually disqualified by the judge. There has been a settlement between the companies as of January 31, 2006. More details were posted to Xfire's forums, though terms were not disclosed.[12]
so im not sure if there would be a plugin for xfire.