Facebook must stop tracking Belgian users’ surfing outside the social network and delete data it’s already gathered, or it will face fines of 250,000 euros a day, a Belgian court ruled. Facebook “doesn’t sufficiently inform” clients about the data it gathers on their broader web use, nor does it explain what it does with the information or say how long it stores it, the Brussels Court of First Instance said in a statement. Facebook must publish the 84-page ruling on its website and display extracts in Belgian newspapers within three months, a court spokeswoman said.