A relatively new lobbying group backed by tech giants including Apple and Google is taking a stand against proposed legislation that targets the outsized market power enjoyed by dominant app stores.On Wednesday, U.S. Sens. Richard Blumenthal, Amy Klobuchar and Marsha Blackburn introduced the Open App Markets Act, a bill that in part calls on tech companies like Apple and Google to be more open to third-party app stores and sideloading.The legislation further takes issue with mandates that require developers to use first-party payment systems, as Apple does with its App Store, punishment of apps that present different pricing structures on outside platforms and leveraging private data to compete with third-party apps. Preinstalled apps and private APIs are also mentioned in the bill.Read more