Facebook isn’t to blame for failing to prevent Lee Rigby murder, says Clegg

After naming of site on which soldier’s killer boasted of his intention, deputy PM echoes comments of former MI6 director

Twitter scanning users’ other apps to help deliver ‘tailored content’

Social network stresses that its new data collection initiative can be turned off by people who feel uneasy about it

Furious reaction greets official report accusing Facebook of failing to prevent jihadi-inspired killing near Woolwich barracks

Cesc Fàbregas, Thierry Henry and Robin van Persie among top sports stars to join funding round for London based start-up

Alan Travis: Outrageous claims by the intelligence and security committee threaten goodwill that exists among internet firms and UK police

Investors hoping for the next WhatsApp are piling in to US startup despite criticism over cyberbullying

Find out how to use social media to get a job and build your professional profile in our live chat on Wednesday 26 November from 1-3pm

Facebook rejects much-‘liked’ union’s petition detailing feudal treatment of drivers at the company’s headquarters in Menlo Park, California

Security boost initially available within WhatsApp’s Android app, but will also come to iOS version. By Tom Fox-Brewster

Controversy over vlogger shows that online popularity is no guarantee that talent will flourish in the mainstream

But social network promises its latest algorithm tweak ‘will not increase the number of ads’ that its users see. By Stuart Dredge

Facebook at Work expected to look similar to regular interface, but will allow users to keep work and personal data separated

YouTube may be the dominant video sharing platform, but Facebook is positioning itself to compete