A bipartisan pair of senators are pressing Facebook over its location tracking policies, questioning whether the social media giant continues to track users even when they've said they don't want Facebook to do so.

Sens. Christopher Coons Christopher (Chris) Andrew CoonsTrump's push for win with Sudan amps up pressure on Congress Murkowski: Supreme Court nominee should not be taken up before election Battle lines drawn on precedent in Supreme Court fight MORE (D-Del.) and Josh Hawley Joshua (Josh) David HawleyHillicon Valley: Subpoenas for Facebook, Google and Twitter on the cards | Wray rebuffs mail-in voting conspiracies | Reps. raise mass surveillance concerns Trump faces tricky choice on Supreme Court pick FBI director warns that Chinese hackers are still targeting US COVID-19 research MORE (R-Mo.) on Tuesday sent a letter addressed to Facebook CEO Mark Zuckerberg Mark Elliot ZuckerbergHillicon Valley: Productivity, fatigue, cybersecurity emerge as top concerns amid pandemic | Facebook critics launch alternative oversight board | Google to temporarily bar election ads after polls close Conservative groups seek to block Facebook election grants in four swing states: report Facebook critics launch alternative oversight board MORE raising concern that Facebook ignores the wishes of users who don't want their exact location to be tracked. The letter comes on the heels of a Facebook blog post in which the company pledged it would stop tracking users' location data when they choose that option on the latest Apple and Google software updates.

But the senators said Facebook's blog post leaves open the possibility that it will continue to record and use location information, even when users have opted out on Apple's iOS or Google's Android software.

ADVERTISEMENT

"If a user has decided to limit Facebook’s access to his or her location, Facebook should respect these privacy choices," Coons and Hawley wrote in the letter. "The language in the blog post, however, indicates that Facebook may continue to collect location data despite user preferences, even if the user is not engaging with the app, and Facebook is simply deducing the user’s location from information about his or her internet connection."

Android 10 and iOS 13, the latest software updates for the Android and iPhone, offer users more control over which apps track their location data. Facebook pledged to listen to those preferences — but noted in the post that it "may still understand your location using things like check-ins, events and information about your internet connection."

"Given that most mobile devices are connected to the internet nearly all the time, whether through a cellular network or a Wi-Fi connection, this practice would allow Facebook to collect user location data almost constantly, irrespective of the user’s privacy preferences," Coons and Hawley, who both sit on the Senate Judiciary Committee, wrote.

Coons is the co-leader of the Senate Judiciary Committee's tech task force, a group mainly aimed at educating senators and their staff about the latest issues around privacy and data security. And Hawley is one of the most outspoken tech critics in the Republican Party.

The senators posed a series of questions, including whether Facebook continues to track location data regardless of users' stated preferences, how much the company gleans from a user's internet connection, whether Facebook uses location information to microtarget advertisements and more.

They are asking for a response by Dec. 12.