(AP) WASHINGTON — In the age of instant tweets and impulsive Facebook posts, some companies are still trying to figure out how they can limit what their employees say about work online without running afoul of the law. Confusion about what workers can Facebook is focusing on integrating news discovery based on your friends' activity in the news feed, CEO Mark Zuckerberg announced today at f8, the company's annual developers conference. By Michael Krigsman | September 26, 2011, 6:50am PDT Summary: Facebook and OnStar have both developed techniques for tracking unwary users. Read this post for your own protection. Facebook and OnStar, the automobile help service from General Motors, Facebook doesn't have a web browser, yet, but Google does. It may not be possible to opt-out of Google's identity system and all the information gathering it doe...