building powerful and fast using the Polymer App Toolbox for example to build super-powered Progressive Web Apps
The Polymer library makes it easy to create your own powerful elements. Give your element some markup and properties, and then use it on a site. Polymer provides useful features like templating and data binding to reduce the amount of boilerplate you need to write.
Hope bubble support PWA in future it will help a lot to speed loading and offline workingapps