Following revelations by whistleblower Frances Haugen and a global outage, the US company faces renewed scrutiny. It could mark a tipping point and prompt lawmakers to get tough on the tech giant.
A report by three US activist groups claims Amazon, Facebook, Google, Microsoft and Twitter made billions from US government contracts since 2004.
Google, Facebook and Microsoft have contributed to "the largest ever effort to lobby the EU" in a battle against new laws aimed at curbing their powers.
An Australian lobby group for Facebook and Google has said its members would move to label and remove false content. Lawmakers have said they would not change a proposal to make the companies pay news outlets.