Thanks Paulo but the issue I'm talking about in my original post is at a more general level. If I'm working on an app over days and weeks, I want to have it backed up so that I can't accidentally destroy all my progress by accidentally making a change and then closing the browser window or something. (or having another team member make a change and not reverse it) Simply tracking history in-browser and offering an undo feature doesn't solve this larger problem. So my current workflow is basically to use releases as a way of saving my work so it cannot be lost (or so that it can be restored if it is lost). I just wish those backups would happen automatically (like how Google Drive saves your edit history).