[rm-rf]

And then Firefox will announce a zero-day. What will you have gained?

[fjarlq]

You'll have gained more time to obtain a fix, because Firefox vulnerabilities are not attacked as swiftly and as broadly as IE vulnerabilities.

[rm-rf]

I haven't seen any evidence of that. Do you have some data that you can share?

One thing that I have noticed is that Mozilla tends to push Firefox fixes out as soon as they are ready, rather than waiting for a monthly patch cycle. For a home user, that's probably good (but annoying). For a corporation, it's royal pain.