SAN FRANCISCO — Facebook paid the founders of ConnectU $65 million to settle lawsuits accusing Facebook CEO Mark Zuckerberg of stealing the idea for the wildly successful social-networking Web site, according to a law firm’s marketing brochure.

Lawyers in the heavyweight fight had expended great effort to keep the settlement secret — even going as far as persuading a judge to clear the courtroom of reporters on one occasion. But ConnectU’s former lawyers from Quinn Emanuel Urquhart Oliver & Hedges published the settlement amount in a firm advertisement trumpeting the firm’s prowess.