All three companies say they intend to abide by local health protocols and safety guidelines as limited numbers of employees will be allowed to return to headquarters.
The leaders of Facebook, Twitter, and Google were not eager to admit fault when it comes to bad information on their platforms, but it's clear Congress is getting closer to regulation.
Facebook's Mark Zuckerberg, Google's Sundar Pichai and Jack Dorsey of Twitter will testify about the steps they have taken to deal with misinformation about the election, COVID-19 and vaccines.
"This activity had the hallmarks of a well-resourced and persistent operation, while obfuscating who's behind it," Facebook said, adding that the malware spread to about 500 people in seven countries.
Advocacy groups are demanding the social network disclose how it reviews Spanish-language content and appoint a high-level executive to oversee policy and enforcement in Spanish.
The three-year deal came weeks after Facebook briefly blocked Australian news outlets' content on its platform to protest a change in the country's media law requiring the company to pay for it.
Research from New York University found that far-right accounts known for spreading misinformation drive engagement at higher rates than other news sources.
The announcement came just as Google reached a deal with Australian publishers and as the president of Microsoft urged U.S. regulators to copy Australia's proposal.