I think he's saying you being slow to make come up with the same idea, is a reference to IE being seen as a slow browser?
Or I'm overthinking it and he's not making sense.
I've tried to decipher his posts before. What I think he's getting at in this one is the "By the guy who defends IE on a regular basis despite being a Firefox user" and he thinks I that I always mention IE in the introductory panel.
Which is false. I've only done it twice. Here's every introductory panel from every comic I've made, including unreleased ones and ones taken down for various reasons:

Or maybe I'm overthinking it too. It'd be great if Maxx was a bit more clear with his posts.