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Google and Meta face the threat of multi-million-dollar fines for failing to delete content that the Russian government considers illegal - but a close look at court papers reveals these are often simply posts about protests in support of jailed opposition leader Alexei Navalny.

In the summer of 2018, a Russian poet writing under the pseudonym Siberian Viking posted a caricature on his Facebook account. It showed the double-headed eagle of the Russian coat of arms, with the bird's heads replaced by faces of President Vladimir Putin and the then-prime minister, Dmitri Medvedev. Alongside it was a short poem, alleging that the eagle was twice as greedy as others, lied twice as much and carried out surveillance with four eyes. It ended with an emotional cry: "When will Russians awaken to remove this contagion?"

The Russian government told Facebook to remove the post because of its "blatant disrespect towards the state, the constitution and the president of the Russian Federation". Facebook did not comply, and the post featured in one of more than 60 lawsuits launched against Western social media in Russia this year, resulting in fines of more than $2m.

How Russia tries to censor Western social media Western social media companies face huge fines as Russia pressures them to remove content it objects to.

Jack Dorsey is one of Silicon Valley's eccentrics. Earnest and idealistic, he passionately believes that tech can bring about global peace and prosperity. He's something of a hippie libertarian, a philosophy that can be baffling. He also happens to be a genuine tech visionary.

His resignation from Twitter is the second time he's left. After leaving the social media giant that he co-founded the first time, he set up the digital payments company Square in 2009 - which has become wildly successful. He then returned to Twitter in 2015.

Until Monday he was running both companies, which didn't sit well with many investors. Last year Elliott Management, a large Twitter investor, tried to make him choose between the two. They wanted a chief executive that spent their time on Twitter and Twitter alone.

This in part explains why Twitter's share price didn't nose dive when their iconic leader suddenly resigned again. There has been a prevailing attitude for a long time amongst investors that Twitter is leaving money on the table - that it could generate a lot more revenue from its large and engaged user base. And certainly a chief executive that had its undivided focus on Twitter might help.

Jack Dorsey: What's next for Twitter's co-founder? The last time the tech visionary left Twitter, he set up another company now worth $100bn.