In a document provided to Congress by Facebook we learn that Facebook is a massive spying operation recording everything about you, including the names of files on your device, data about other devices on your network or near to you (including from people who never gave Facebook permission), and records things you buy from other web sites (meaning, not on Facebook – see note)... literally, everything. Mark Zuckerberg repeatedly lies about the massive spy operation conducted by Facebook.

1. information from “computers, phones, connected TVs, and other web-connected devices,” as well as your “internet service provider or mobile operator”
2. “mouse movements” on your computer
3. “app and file names” (and the types of files) on your devices
….
6. information “about other devices that are nearby or on their network”
….
11. “purchases [users] make” on off-Facebook websites
12. contact information “such as an address book” and, for Android users, “call log or SMS log history” if synced, for finding “people they may know”
….
14. “location of a photo or the date a file was created” through the file’s metadata
15. information through your device’s settings, such as “GPS location, camera, or photos”
16. information about your “online and offline actions” and purchases from third-party data providers
17. “device IDs, and other identifiers, such as from games, apps or accounts users use“

Source: Here Are 18 Things You Might Not Have Realized Facebook Tracks About You
Note
When I visit Amazon.com, a total of 25 “trackers” are invoked, including from DoubleClick, Yahoo, Advertising.com, Taboola, Adobe and many, many more.  A visit to Walmart indicates Facebook Custom Audiences are tracking us. Target shows Bing advertising tracking, Google tracking and many more in use.