Digital euro is the solution

My goal is to code basic buttons and understand how operating systems implement the way they draw windows for applications.

So do you want to program a GUI yourself, and not using a library, correct ?

For that you need a ROM that supports signature spoofing, but it should be possible, just not for the common user, sadly

I understand, but if the application opens the browser you have to make it believe that it is opening Chrome

Have you tried changing the user agent ? You need an extension for that

Ufficialmente no, però se in un post è presente un collegamento a un altro post, alcuni client come Moshidon lo mostrano come citazione.