'We didn't mean to track you' says Facebook as social network giant admits to 'bugs' in new privacy row

In its latest privacy blunder, the social networking site was forced to confirm that it has been constantly tracking its 750million users, even when they are using other sites.

The social networking giant says the huge privacy breach was simply a mistake - that software automatically downloaded to users' computers when they logged in to Facebook 'inadvertently' sent information to the company, whether or not they were logged in at the time.

Most would assume that Facebook stops monitoring them after they leave its site, but technology bloggers discovered this was not the case.

In fact, data has been regularly sent back to the social network’s servers – data that could be worth billions when creating 'targeted' advertising based on the sites users visit.