How do I emulate a tablet in Devtools/Firebug…?

I have a difference in the displaying of what my iPad(s) show me in reality and what google devtools shows me for a simulated iPad.

As I need to debug the error somehow I am looking for an option in DevTools to really simulate an iPad (maybe even connect?) or to use DevTools on my Tablet?

I need to debug a website and thereby especially the css btw.

How do I simulate a websocket disconnect manually? (Firefox or Chrome dev tools)

How do I simulate a websocket disconnect manually? I’m trying to test websocket reconnect logic, and I have no way of doing this other than waiting for the browser’s 10 minute websocket timeout.