How We Build Custom Chromium Browsers — A Technical Deep Dive

If you've ever wondered how companies like Brave, Arc, or Opera build their own browsers on top of Chrome — this is the article for you. At Entalogics , we've built multiple custom Chromium browsers for enterprise clients. Browser security companies, fintech platforms, AI startups — all needing a browser that does exactly what they want, nothing more, nothing less. Here's how we actually do it. What is Chromium? Chromium is the open-source project that powers Google Chrome, Microsoft Edge, Brave, Opera, and dozens of other browsers. Google maintains the codebase and it's publicly available. When a company wants a custom browser, they fork Chromium — they take the source code and build on top of it rather than starting from scratch. This makes sense for several reasons. You get a production-grade rendering engine for free. The JavaScript engine is already battle-tested by billions of users. Security patches from Google flow upstream automatically. And you're not spending years building