"We continue to have these abuses and these data breaches", DeGette said.
Mr Zuckerberg repeated apologies he previously made for a range of problems that have beset Facebook, from a lack of data protection to Russian agents using the social media site to influence U.S. elections.
Facebook might be able to censor publishers with blue checkmarks, but like Zuck himself said Wednesday, they literally can't hire enough people to police every single person on the site.
Mr Zuckerberg's admission that his own data made its way into the hands of Cambridge Analytica laid bare that even the company's technologically adept founder was unable to protect his own information from parties seeking to exploit it.
Zuckerberg said he was getting to the bottom of what the UK-based firm did and will tell everyone who may have been affected.
On Tuesday Facebook began notifying more than 87 million people around the world, including one million Britons, that their private information may have been given to Cambridge Analytica by an app developer from Cambridge University.
Facebook is directing people to their settings page where you can update the information you share with apps and websites. He cited examples of ads showing up on Facebook relating to conversations they had just had.
Responding to a question, he told lawmakers that he meant to initiate legal action against the firm accused of stealing personal data and using it for political purposes in the 2016 US Presidential elections. The social media site has more than 2 billion users along with access to all your pictures, videos, comments, what you share, what you like, your location and other information regarding anything you do. "Even if someone isn't logged in, we track certain information, like how many pages they're accessing, as a security measure".
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Mark was asked by multiple senators if he would ever he launch a version of Facebook that costs money, but is ad free - sort of like the difference between Spotify free and Spotify Premium. But the resulting file mostly contains a jumble of contacts, messages and advertisers who have been allowed to target you through Facebook.
With that in mind, legislators pitched a mix of policy ideas ranging from giving consumers more control over their data and boosting transparency for online political advertisements to pushing back at Facebook's alleged monopoly power.
Facebook on Monday said: "Our goals are to understand Facebook's impact on upcoming elections - like Brazil, India, Mexico and the United States midterms - and to inform our future product and policy decisions".
"The only time we might use the microphone is when you use the video, but we don't have anything that is trying to listen to what's going on in the background", Zuckerberg said. "But there are also things like, 'how does it affect children, how does the platform create addiction, how does the platform encourage extremism, how does the platform push American values onto other countries?'" We do pay to help produce content.
According to Zuckerberg, the company has 200 people working on efforts to combat the promotion of "extremist" content.
However, a former Facebook employee who used to work in its ads department took to Twitter to falsify Zuckerberg's response.
"I do imagine that we will find some apps that were either doing something suspicious or misusing people's data", he said.
"I started Facebook, I run it, and I'm responsible for what happens here", he continued.