The rumors were true, OpenAI has a web browser and it’s called Atlas. As you might expect, it integrates ChatGPT front and center with instant access to an AI chatbot at your disposal without having to jump between apps or browser tabs.
The browser is Chromium-based and currently exclusive to macOS. It supports data syncing from other browsers, and OpenAI has confirmed plans to release Windows, iOS, and Android versions.

Atlas builds on top of ChatGPT search with the ability to surf the web and search on behalf of the user. You can ask context-specific questions on any website and Atlas will provide answers, summaries and even complete works.
Atlas has a memory function, which allows it to refer to previous ChatGPT conversations so you can pick up where you left off. You can also ask Atlas to recover files or tab groups you’ve previously opened. You also get a ChatGPT sidebar that integrates directly into the browser so you can have your normal ChatGPT experience.

Atlas also integrates ChatGPT agent functionality so it can complete tasks on your behalf. Agent mode will be exclusive to ChatGPT Plus, Pro and Business users for now.
OpenAI also added strategic safeguards to Atlas such as not being able to download files, run extensions or code, and it not being able to connect to other applications on your computer.
source
