Excuse me from asking, but why would anyone want to use this? You've said that the wallet uses public APIs and so, your IP can be tracked, that the users should be extremely cautious etc. You've literally called it the most dangerous wallet, and it's true. There are many things you should be aware of such as your browser extensions, programs that have access to your browser etc.
Sure, it might was a good exercise to code it, but to serve it as a "fast & anonymous wallet"? I think it's just bad. Benignly.
It's just about as anonymous as you are going to get.
You can download and run it locally and connect to any public Wi-Fi
Someone can send you
BTC and there is never a wallet on your PC so to speak.
You can then send it to a mixer and once you clear your browser cache it never existed.
-Dave