If most people are making their money on blogs through adsense, and firefox doesn't show up adsense adds... then are you just missing out on a lot of possible money?
I just looked at my blogs through FF and they showed up fine, you may have the ads set to be blocked, I think I read about that somewhere.
Some add-ons for FireFox will stop Adsense from showing like No Scripts will not show Adsense unless I unblock the site.
yes most firefox people use AdBlockers so block adsense...but visiting a site and blocking it's ads is a criminal offense...... One of my friends block ff users in his new game site http://targetlife.com/why/ opens when we open http://games.targetlife.com http://targetlife.com/why/ informs something about adblocking...