i downloaded by mistake zynga poker toolbar and i whant to delete it but i dont know how ! what should i do ?

Delete it from your Addons. Go to Tools>Addons>Extensions find Zynga Poker Toolbar and click uninstall. If it is not there go to Start>Control Panel>Put it to Classic view from the left side then go to Add/Remove Programs


hope it helps ! :)
Thanks Moses Firefox Support