Good News everyone! A new version Excalibur Dev Tools Extension had been deployed to the Chrome/FF web stores!!!

Release: https://github.com/excaliburjs/excalibur-extension/releases/tag/v1.0.3

Chrome: https://chromewebstore.google.com/detail/excalibur-dev-tools/dinddaeielhddflijbbcmpefamfffekc

FF: https://addons.mozilla.org/en-US/firefox/addon/excalibur-dev-tools/