Add usage statistics to my WEB site

I want to have statistics for my React.JS based WEB site. I want to track witch pages that are most visited and how much time users spent on different pages. The implementation must be a component that can be injected in other React.JS components and create statistics without interfering the other code. The statistics must be anonymous and must be stored in Firebase database. I’ll need also a React.JS component that show the statistics as a tables and charts for a selected period of time.