Safari and Firefox are next, feel free to subscribe to the issues below so you know when Extension.js supports them. - Safari https://github.com/cezaraugusto/e

Safari and Firefox are next, feel free to subscribe to the issues below so you know when Extension.js supports them. - Safari https://github.com/cezaraugusto/extension.js/issues/46 https://github.com/cezaraugusto/extension.js/issues/46 - Firefox https://github.com/cezaraugusto/extension.js/issues/5 https://github.com/cezaraugusto/extension.js/issues/5