Hi, thanks for the feedback !
So, it's kind of like blockchain.info, but for multiple coins?
Yes that's right. And yes, main feature here is that the private key is stored in browser cache and not the website itself. Blockchain.info and other "online-wallets" do not allow private keys and store them in their servers.
I think that might require more proof that the private keys aren't stored on the website?
Soon the source code will be available on the GitHub. Right now you can see the source code by using browser tools.
so site just generate bitcoin address and private key with java and then store that in session cookie in browser which than will be used to do transactions?
Than i think you can also add lots of other coin in your site in this way.
Yes, I plan to add support more forks in the future.