No? But why does it matter? They can include Firefox in their OS and set the default search engine to anything they want.

The point was that developing Safari isn't what makes apple the money, it's setting Google as the default search engine of the default browser. So if Apple would stop maintaining safari tomorrow and would switch to preinstalling Firefox, they would still get the Google money (for setting Google as the default search engine of their Firefox installation). So Safari isn't profitable for Apple, as was claimed before.