Custom Chromium browser build windows

Job ID: 36074050

Budget: $30 – $250 USD

I need a developer having experience building custom chromium browser on windows.
The general goal is to: Embed custom js code into browser like what a regular chrome extension can do, but without an extenion "icon" actually shows up on chrome extension menu.
Example:
Let's say we have an extension that set js logic like ` document.body.style.backgroundColor = 'red'` for every webpage opened. Instead I need a way to embed this js logic directly into the browser, either through C++ implementation/ code modification or through some hidden browser UI api that doesnot show up an extension button/icon on chrome extension menu list.

As you get the idea, we will discuss further development based on your experience with custom chromium.
Start with "HelloChromium" to make sure you are not a bot and understand the description