There is a bug with firebase@5.11.1 When install last version of firebase getting error on my server: ``` /dist/server.js:75602 if (self && 'firebase' in self) { ^ ReferenceError: self is not defined ``` With version 5.7.3 works fine. I am using Angular 7 with server side rendering and @angular/fire": "^5.1.3" pkg as well.