Azure Cosmos DB Data Explorer provides a rich and unified developer experience for inserting, querying, and managing Azure Cosmos DB data within the Azure portal and the emulator. Data Explorer consolidates the functionality previously available in Document Explorer, Query Explorer, and Script Explorer, so that they can all be done without switching views. With this announcement, Document Explorer, Query Explorer, and Script Explorer will no longer be available in the Azure portal.
Learn more abouit Cosmos DB Data Explorer.
Source: Azure Roadmap