They definitely aren't cookie opt-in popups in any browser. Nor is there coarse-grained cookie management, like what websites implement. Nor fine-grained cookie management, like they should have.
Be the change you want to see in the world. It is supposed to be a user agent. Instead of imposing this cost on everyone else, if you think it is important to be able to have fine grained control over cookies, make it happen.
Advantages:
1. A single UI in each browser instead of a different one on each website
2. The functionality would be built and maintained by someone with allied rather than adverse interests to the user.
Also you can disable cookies quite easily and whether your UI supports it or not is totally irrelevant anyway. If you use a web browser that sends cookies to websites then that you have authorised it to do so is your responsibility. Use a different browser or don't use one if you don't like it.
