You don't have to add types to start using a new library or web extension. At most you have to add 'declare var foo: any;' or cast a builtin to any if the type

You don't have to add types to start using a new library or web extension. At most you have to add 'declare var foo: any;' or cast a builtin to any if the type declaration doesn't have the property you need. Typesript always lets you use the any type as an escape hatch if you don't have types.