I've complained directly to Google dozens of times about this, and emailed many bloggers to talk about such a treatment. I usually heard back "but Firefox has no market share in mobile browser today". Obviously, who would use Firefox when it renders such a simple webpage so badly!

Firefox supports ad-blockers, which would certainly bring them a significant share of the browser market if it was treated fairly. Or else, Chrome mobile would have allowed ad blockers a long time ago and we would have an healthy competition.