So I am making browser and I want to make users undetectable by changing IP but only in the app. So when user closes that browser, user will get he's/she's normal IP.
To change the ipaddress to external apps, you create a proxy server. This server must be between your isp’s router (which supplies the ipaddress to external sites) and the site the browser is connecting to.
So you want to create a cloud hosted proxy server. Typically you would also want a vpn to the proxy.
Note: unless you are using a static ipaddress assigned by isp, your local ipaddress are private and hidden behind nat translation. It’s the public ipaddress assigned to you by the isp what sites see.
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