Britain proposed new online safety laws on Monday that would slap penalties on social media companies and technology firms if they fail to protect their users from harmful content.

Easy access to damaging material particularly among young people has caused growing concern worldwide and came into the spotlight in Britain after the death of 14-year-old schoolgirl Molly Russell, which her parents said came after she had viewed online material on depression and suicide.

Governments across the world are wrestling over how to better control content on social media platforms, often blamed for encouraging abuse, the spread of online pornography, and for influencing or manipulating voters.