Hostilities Between Microsoft and Google Resume Microsoft and Google are resuming open hostilities, following a five-year cease-fire. Microsoft and Google had an agreement, beginning five years ago, to stop suing each other and work out their differences behind closed doors. During that period, the two companies worked closely together on some projects, not the least of which is Microsoft adopting Chromium as the rendering engine for its Edge web browser. The company has become one of the biggest contributors to the open source rendering engine, with many of Microsoft’s improvements making their way into Google’s Chrome, also based on Chromium.