Is it possible to somehow influence the Google Chrome App code?

Question

JavaScript

I studied the code of some application and I would like to change something in it?
Is it possible to do this somehow?

Answer 1

no, I need to somehow embed my code into the code of an already running application. But as if it were only me.

Well, only you will have it, it's a client, and if there is a server, then you won't hack it!
Of course, it is possible that Chromium has an open source code, so it is possible to repack CRX if you work on it, though I saw a problem with extensions (not applications) that they check with the originals from the Store, but you can put a traffic interceptor or "patch Chromium itself, and if your browser can install an application not from the Store, and it will work after it is restarted, then this problem will not exist at all.