Through LinkedIn’s more than one billion business users, the Microsoft unit has access to a vast array of personally-identifiable information, including data that could identify religious and political positions. What is less clear is what LinkedIn does with all of that data. A small European company that sells a browser extension to leverage different aspects of LinkedIn data is running a campaign, which it calls BrowserGate, that accuses LinkedIn of “illegally searching your computer” and “running one of the largest corporate espionage operations in modern history.”  “Every time any of LinkedIn’s one billion users visits linkedin.com, hidden code searches their computer for installed softw...