'The creepy ways Facebook spies on its users have been detailed in a bumper document presented to Congress.
They include tracking mouse movements, logging battery levels and monitoring devices close to a user that are on the same network.
The 454-page report was created in response to questions Mark Zuckerberg was asked during his appearance before Congress in April.
Lawmakers gave Zuckerberg a public grilling over the Cambridge Analytica scandal, but he failed to answer many of their queries.
The new report is Facebook's attempt to address their questions, although it sheds little new light on the Cambridge Analytica scandal.
However, it does contain multiple disclosures about the way Facebook collects data.
Some are unsurprising, such as the time people spend on Facebook, while others may come as a shock to the majority of users.
Facebook tracks what device you are using to access the network.
To do this, it will log the hardware manufacturer of your smartphone, connected television, tablet, computer, or other internet-connected devices.
Facebook also tracks the operating system, software versions and web browser.
If you're using a smartphone, it will keep a record of the mobile carrier, while internet service providers (ISPs) will be stored for users using a Wi-Fi or Ethernet connection to access Facebook.
In some cases, it will monitor devices that are using the same network as you.
'Facebook’s services inherently operate on a cross-device basis: understanding when people use our services across multiple devices helps us provide the same personalized experience wherever people use Facebook,' the firm wrote in the lengthy document.'
Read more: The 18 things you may not realise Facebook knows about you: Firm reveals the extent of its spying in a 454-page document to Congress
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