Comment by happyopossum

> an API allowing the querying of a lot of information about all the open tabs (if open, for example, your banking website)

No. It uses the chrome.system.cpu API, that any extension can access, which gives CPU and RAM utilization info about your tabs. It doesn't give anyone "a lot of information about all the open tabs", and does nothing to expose your banking website...

https://developer.chrome.com/docs/extensions/reference/api/s...