Weird, I didn't raise any of those issues in my comment, this seems a bit out of left field. For example, I never mentioned CD-ROMs at all, which is not an issue on the table.

The only browser I know of that asks you if you want it to be the default is Internet Explorer, which is of course stupid, since even if you say "No", half the time it would still force itself on you as the default anyway, like a mangy unwanted houseguest. ;-)