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Or get a cheap mac (mac mini, for example). Then you can run the iPhone emulator and use Safari to debug. Works really well. Edit: Oh, you mean you tried this, but it works differently? Or are you using some linux-based dev tools?
No I've just been using the iPhone user agent "simulation" in Chrome's dev tools. All this does I think it set a reasonably correct resolution and scaling factor, but all the other rendering specifics get overlooked.
OK. The iPhone simulator that comes with Xcode is really close to the real thing. You need a mac for it though.