[matusfaro]

> love a tool to see which tabs are talking with each other also

Cool idea but probably not that useful and difficult to accomplish. There are many ways to communicate that could be grouped into:

1. tab -> tab (same domain)

2. tab -> tab (different domain)

3. tab -> server -> tab

For #1, there are so many ways to transfer information it would be hard to detect and differentiate whether it's communication or just happens to be using the same resource. (e.g. one sets a cookie or local storage and the other one reads it)

For #3, it would be impossible to detect. Especially if detection is an issue, both tabs could be communicating with unrelated servers which talk with each other.

For #2, it would be the only interesting one as there is limited options (e.g. Broadcast Channel), but at the same time I assume rarely used in practice. And if detection is an issue, they would switch to #3 to avoid it.