Web browsers are top targets for hackers. They’re abused in more than 90 percent of attacks meant to hit random Internet users (versus more targeted strikes), according to Kaspersky Labs. And more than half of those attacks exploit flaws in browser software and seek to install dangerous malware on computers. “Why all the attention? Because browsers are an easy target. Computer users perennially ignore update reminders and run old versions with well-known security holes. They also use ancient browser plug-ins, which aren’t as easy to update and are often rich with known vulnerabilities. As a result, a whopping 80 percent…