Advertisers target Microsoft browser

I think he's pulling your leg. Advertisers target IE users because of distinct demographics they've identified: more likely to be surfing from work, less technologically capable, inclined to use what others use, etc. I'm sure there are also huge international demographics. India is very PC as I understand it, while Japan has more Macs percentage wise than the U.S.

Which browser you choose to use says a lot about you.

it defenitely has to do with the demographic dsitributuions. India - The best consumers who drive markets, more PCC users. So if Asia in specific India was studied may be yes this is the fact. i don't think the west follows much based on ads but they search to fid and the maket behaviours are very differnet. So is the case with Japan may be.

That definitely makes sense. IE users are less experienced and more naive about web ads.

Or people who run firefox are more likely to have an adblocker installed.

I agree with Mark.
The advertisers that target IE users are probably related to spyware/adware copmanies. IE is much easier to get install on.

Mark, good points, especially about surfing from work. We can and do use Firefox here, but if we want to get into certain corp applications, only IE works. I imagine that's true elsewhere too.