Still not enough. You are using Chromium but your software might not be secure enough. You are dealing with sharing data all over the internet and part of your code is not opensource.

If we cannot inspect or reproduce what you are doing , we cannot trust our work with your browser. We might as well consider you are stealing our data.

If you launch self-host option , you should opensource it.

What we have for opensource alternatives are :

https://github.com/BrowserBox/BrowserBox https://github.com/m1k1o/neko