[lasryaric]

> The major browsers I've tested — Safari, Chrome, Firefox — all allow web pages to send requests not only to localhost but also to any IP address on your Local Area Network! Can you believe that? I'm both astonished and horrified.

I guess this should serve as a cue that there is something off in what you are writing. You did not just discover a major security flaw in all web browsers while not being an experimented (at least web) software engineer.