The first statement only tells you when B is true. It says nothing about when it is false. The second statement both tells you when B is true (if A) and when it is not (only if A). Therefore, the two statements cannot be equal.
Baldur's Gate (the first) is mother of modern CRPG's and what started BioWare. BG3 is arguable the best in it's genre and surpasses Dragon Age: Origins from 2009.
The main reason I've heard is that chromium is far easier to embed than Gecko. Gecko isn't something you embed like a library. It's something you build upon. Detaching Gecko from Firefox UI (or Thunderbird for that matter) is supposedly really hard.
I love this search engine. I've already found several new sites that I never knew I needed in my life.