Hi, I am web developer. App I am working on need to connect to remote host by webscoket and send auth cookies to it (aws guard). The problem is when I run app on the local host (dev mode), it works fine in every Chrome based browser, and even Safari, but unable to connect in FF. For example, my app runs on localhost:8080, and Websocket host is ws.dev.myapp.com For successeful coonection, handshake request should include cookies from .dev.myapp.com domain, or even .myapp.com. So, you can see on screenshots, cookies not included on request from localhost, and we get 403 error instead of 101 on second pic. I guest this is some secutiry setting I can tweak, but I can't see what exactly. Or can it be a bug?