I am wondering what the main lines and point of the Franco-Sicilian Defense are for Black. I could barely find any theory about it online, and it' is my favorite opening as Black. As such, I am looking to improve on it. Any reference material will also do!
I also wonder why it is so rarely played. The engine doesn't hate it that much, and it fights the center very well, as well as allowing for a quick queen and dark-squared bishop battery in the midgame. So what is the effective response from White that makes it so unplayable? I have yet to encounter one.
[FEN ""] 1. e4 e6 2. d4 c5