On: Mozilla Lightbeam – Relationships between third parties and the sites you visit

[sp332]

Well, you could make sure they're working? Or double-check that none of your whitelisted sites are doing anything too suspicious. Or maybe just for gloating :)

[hnha → sp332]

It does not seem to monitor actual requests but only references. I block a lot of domains but they still appeared in this add-on.

[sp332 → hnha]

How are you blocking them? Sites blocked by RequestPolicy and Ghostery don't show up.

[hnha → sp332]

In my router! I guess it returns a.status that the tool interprets successful connection.

[sp332 → hnha]

It probably counts when the request is made, without waiting for a connection to be successful.