Well I disagree with him/her there too. What made Firefox good was that it was a lightweight, simple browser, that rendered content exactly the same on three OSes. It's still my main browser, but that's only because I want less Google in my life, and because Safari aspires to be a motion picture instead of a tool. But I haven't considered Firefox actually "good" since probably 2010, or whenever it was that they dumped a bucket of LSD on the interface. Since then it's become a bloated mess.

If someone wants to add toolbars and skins, etc, I suppose the new API would disappoint. But it's hard for me to relate, because I'm not that adventurous. The ones I really care about, generally AdBlock and privacy extensions, just interact with web content, not chrome. That sort of add-on is just as available on Google Chrome.