Twitter cofounder Biz Stone appears to slam Elon Musk over 'gross' release of 'Twitter files,' saying he's not a serious person

• Twitter cofounder Biz Stone appeared to criticize the platform's new owner, Elon Musk.
• Last week, some internal Twitter emails were leaked online by journalist Matt Taibbi.
• In an apparent reference to Musk, following the leaks, Stone said he was "not a serious person."

Biz Stone, one of Twitter's cofounders, appeared to slam the company's new owner Elon Musk on Saturday.

Some of his comments were a reference to the recently leaked "Twitter Files," which were billed as a revelation about how the platform's content-moderation practices worked.

Resharing one of Musk's tweets about his plans for more "Twitter files," Stone simply wrote: "Gross."

Musk originally teased the release of the so-called "Twitter Files" last week, claiming they would show "free speech suppression." Some of the documents were shared on Twitter by Matt Taibbi, an author and journalist who writes the Substack newsletter TK News.

One of the revelations focused on internal Twitter communications about the controversial suppression of a news story concerning Hunter Biden's laptop.

Insider's Katherine Tangalakis-Lippert reported that the files showed the 2020 Biden presidential campaign asked Twitter to remove posts, including nude photos of Hunter Biden, which were already in violation of its revenge porn policy.

In an apparent reference to Musk, Stone later tweeted: "He's not a serious person. He does things for sport that have serious consequences for real people."

Responding to a user's tweet that accused Musk of being reckless, Stone wrote: "It's heartbreaking. All the world events we didn't make public to protect brave people. Also, on the Trump poll, "The people have spoken!" How many Russians voted? It's global."

He added: "That's not what we made it for."

Representatives for Musk and Stone did not immediately respond to Insider's request for comment.