Ok it says that we will get 20 horseshoes as well as 1 per day for 15 days so 35 total horseshoes. The only problem is they only support Internet Explorer 7 and Firefox. I am a new iMac owner and new to Apple. So I don't know is this something I should download (I mean the Firefox)? I am scared to do anything. I have it open on my other screen. If I say no now can I do it later or is this a onetime deal? I don't even know if Firefox is compatible with Macs. Is this going to be annoying thing? Please help me, if you have any suggestion on this.