Progressive Web Applications are the state of art of modern web solutions. With the proper caching strategy it is possible to drastically improve the overall performance and providing data even without a network connection. In an increasingly mobile first world, optimising the time to load of web pages can be the success of our business. In this presentation, we’ll see how easy is to build PWAs with Angular and Firebase, making our apps fast, native-like and able to provide a truly seamless experience to our users.