Hello wishmasterjo,
No matter what browser or programme you use. As of now Google Adsense is the top one in the globe, and who knows Yahoo might pick a thread in the coming months.
Sure, they do not control on your revenue. It is all depends upon your clients visit and peeping into their ad. If your site attracts a good number of visiotrs, then the chances are, you should recover atleast your internet and web site maintainance expenses. If attracts larger number of visiotrs, then there ought to be some more benefit. But for any beginners, first two or three months, it will be very difficult to judge the trend.
If your site does not attract any visitors, then no ads will bring you any revenue, leave alone Google-Adsense.
Best wishes,
TRS Iyengar
www.trsiyengar.com