Assuming this source is up to date[1] (and I'm reading it right), then the intersection of chrome ES6 features and Typescript ones is an empty set, while the Ty

Assuming this source is up to date[1] (and I'm reading it right), then the intersection of chrome ES6 features and Typescript ones is an empty set, while the Typescript ones are a strict subset of Firefox's ES6 features. [1] http://kangax.github.io/compat-table/es6/#typescript http://kangax.github.io/compat-table/es6/#typescript