Back in July, researchers from Malwarebytes warned that cybercriminals were using browser-based JavaScript ransomware to trick OS X users into paying a so-called fine. Experts say the threat is still doing the rounds. According to Malwarebytes Jerome Segura, the latest version of the scheme is designed to earn more money for the cybercrooks. After users pay $300 (222) to have their browsers unlocked, a second screen is displayed asking for an addit…