Various reports put Firefox's market share at 10 to 15 percent. Yet I can't view 75 percent of rich media ads while using Firefox. And while many online ad designers toil away on Macs, they often can't see the fruits of their labor in a live environment.

If you're a marketer, an agency executive, or a creative professional, this should give you pause. Ask yourself the following important questions about your own rich media planning and development...