There is no magic fairy dust protecting Macs - Dai Zovi, security researcher and co-author of The Mac Hacker's Handbook.
You could read the last panel either of two ways:
1. Microsoft is noting that they get that many downloads every time they release patches for Microsoft products.
2. Microsoft is wondering if Firefox will achieve the same number of downloads for the security patch that will come as a result of vulnerabilities found in the release, the first of which came five hours into the challenge.