Evenhandedness
Since I admonish Google for being heavy-handed in similar ways, I'll admonish Mozilla as well. It is not the web browser's role to decide what is or is not acceptable, and I resent it when they do.
Fortunately, I use neither Chrome/Chromium nor the "modern" Firefox (in small part because of this sort of nonsense), so this won't affect me. But it irks me just the same.