Edit files in a repo and see their changes instantly.
Resources:
GitAuth https://developer.github.com/apps/building-oauth-apps/authorizing-oauth-apps/ https://developer.github.com/v3/guides/basics-of-authentication/ https://developer.chrome.com/apps/app_identity https://developer.github.com/apps/building-oauth-apps/understanding-scopes-for-oauth-apps/
Communicating from page to Extension https://developer.chrome.com/extensions/content_scripts#host-page-communication