...it would also be helpful if Canvas warned you before navigating away from unsaved content. Chrome, Safari and Firefox display a confirmation dialog when you try to leave a screen with unsaved content, but only when editing Pages. It's too easy to navigate away from unsaved content when editing the Syllabus Description, Assignments, Quizzes, etc...
Open for Voting
There is a lot of traction on this request to Auto Save in Rich Content Editor but an intermediate step between here and there might be a warning when you are leaving a page with any unsaved changes. Here is the issue as described by Christine :