Can I use the back button on my browser to go back in the application to a previous page?

No. Once an application has been started, you can only move forward in Harvard Careers. The back button will direct you out of the application (losing any progress) and back to the job description. In order to make edits, continue through the application until you hit the "Review" page. This page allows you to read over all sections of your application and go back to edit any (utilizing the pencil icon button) before submittal.