Fabric, a suite of developer tools owned by Twitter, is being acquired by Google and will become part of Google's Developer Product Group, working with Google’s Firebase team. According to Francis Ma, Firebase Product Manager:
As a popular, trusted tool over many years, we expect that Crashlytics will become the main crash reporting offering for Firebase and will augment the work that we have already done in this area. While Fabric was built on the foundation of Crashlytics, the Fabric team leveraged its success to launch a broad set of important tools, including Answers and Fastlane. We'll share further details in the coming weeks after we close the deal, as we work closely together with the Fabric team to determine the most efficient ways to further combine our strengths.
It appears that Google is clearly interested in Crashlytics, Fabric’s crash reporting tool, but has left open the extent to which the other components of Fabric will be incorporated into the Firebase toolset.