It’s designed for stealing your data, they can’t exactly list that as one of their primary use cases but it’s the truth. You are there to help feed their training models.
I am incredibly amused by the idea that OpenAI was so cynical about the latest in what people are hyping that they decided to make a browser themselves.
It is still early days - gpt powered browsers are becoming a commodity. One use I've found is leadgen automation. But it still not stable and frequently ends up in infinite loops.