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I have see that more IDE (Netbeans or eclipse for example) have the option for not open the browser when execute the debug/launch.
I need this feature for debug my code!

That would certainly make sense.
I was looking for that feature for situations where I have to start the debugging from some other process setting up the ebug-Cookie. In this case internal subrequests. This would also be nice for setups where the server is active and connects to the debugger for every single request. This makes sense on pure development systems.

So thumbs up from me!