diagnostic · one of 36 Pro register
Third parties
What third parties is this site actually loading?
A consent banner lists the vendors somebody remembered to declare. This lists the hosts the page actually contacted, which is a different set often enough to matter - and for each one, the company behind it, how much it moved, and whether it blocked rendering while doing so.
Reach it Press ⌘ + K on any tab and type third parties. Ctrl + K on Windows and Linux
in the panel · this one is Pro
What this actually is
every host contacted and the company behind itWhen preparing a privacy record and the declared vendor list came from somebody’s memory, and when a page is slow in a way the first-party bundle does not explain. The register form is the one that saves real time: it is the same reading, written out rather than read off.
Asked about this diagnostic
3 of themIs this a privacy audit of the site?
It is a list of who the page loaded and what the tables say they are. What that means for a particular jurisdiction is a lawyer’s question, and a tool that answered it would be wrong on the first page it met.
Does it catch things loaded after I look?
Anything the page requests while the panel is open is included, which covers most consent-gated loading. A script that only fires after a purchase will not appear, and no reading from outside can promise otherwise.
Why is a domain I recognise listed as unknown?
Because the tables have no entry for it. An unknown row is reported as unknown rather than guessed at from the name - the guess is exactly the thing that would make the register untrustworthy.
how to use third parties
- Open Third parties once the page has loaded.
- Read the hosts the page actually contacted, grouped by origin and then by owner.
- Compare that against the vendors the consent banner declares.
- Read how much each one moved, and whether it blocked rendering while doing it.
written about at length
- builds 5 min What a page tells you about how it was built The six kinds of evidence a page leaves about its own stack, which of them can be trusted, and how each one is faked.
- privacy 5 min Why this extension asks for no website permissions How an inspector reads any page without requesting access to any site, and what that costs to build.
70 of these · no host permissions · three free audits