Candy Crush killer? Facebook names Cookie Jam as its best game of 2014

Social network says it now has more than 375m people playing games across web, smartphones and tablets

Yik Yak hack is latest warning of the risks of ‘anonymous’ messaging apps

Thankfully for the startup’s users, its vulnerability was unearthed by a security company not a malicious hacker

Are anonymous apps a haven for cyberbullying? Open thread

Have your say on After School app, as well as Royal Mail 3D printing, Europe’s possible Google breakup and more

Zoella Sugg, online queen: followed by millions but ‘cripplingly shy’

Sugg’s videos dispensing beauty and life advice have 307m views, and now she has the fastest selling debut novel ever

When data gets creepy: the secrets we don’t realise we’re giving away

Ben Goldacre: We all worry about digital spies stealing our data – but now even the things we thought we were happy to share are being used in ways we don’t like. Why aren’t we making more of a fuss?

Can Uber become a ‘smarter and more humble’ company? – Open thread

Have your say on $1.2bn funding round as well as Facebook, mobile games v console games, Russian dark web drug lords and more

Google and Facebook will have more than half of UK digital ad market

Advertising on websites, smartphones, video and social media will see UK operations make £4.1bn in 2015, according to report

Facebook video app ads will now auto-play on mobile – Open thread

Have your say on the latest change to social network’s news feed, as well as Kim Dotcom, Stephen Hawking, Stampy and more

Twitter’s top management sold $50m-worth shares in November

Social media firm’s chief executives dump millions of shares with CEO Dick Costolo shedding almost 50% of his holdings

The touching hug photo from Ferguson protests is a blatant lie

Jonathan Jones: Framing the debate: It’s absurd that a nation’s new, yet old, encounter with its most destructive division can be summed up by this soppy picture of a tearful hug

If tech companies wanted to end online harassment, they could do it tomorrow

Jessica Valenti: The courts may decide that sending threats over social media isn’t threatening enough to be a crime. Silicon Valley needs to step up or lose customers

When is a threat to kill a joke? Or art? Supreme court weighs online abuse

Should courts care what someone really means when he says he wants to make his wife a bloody corpse or is the fear such comments create what is important?

Europe’s next privacy war is with websites silently tracking users

European data protection watchdogs publish guidance on web tracking using device fingerprinting that could result in more ‘I agree’ forms

What have we learned from the Uber privacy debate? Open thread

Have your say on the American Civil Liberties Union’s lessons, plus eBay’s magic mirrors, Anita Sarkeesian, and a new way to respond to rape threats on Facebook

MPs say they need ‘serious discussion’ with social networks over users’ data

All-party committee demands clearer terms and conditions, and suggests global ‘kitemark’ for responsible services