Can I post referrals on non-content pages? like www.jeshil.com main page? I was thinking to post a firefox button, a google earth and maybe a few more if its allowed.
HHmm.. that's a tough one.. You should send an email to Adsense Support, then let us know what they say.
Of course you can not! It doesnt really matter if its an ad-unit, adblock or refferal. None of those are allowed on no-content pages.
I am not 100% sure but I doubt they'll let you considering their rule that you cant have an G-ad in same place or as your site menu/navigation.