Issue: When an instructor uses Crocodoc annotations for a supported assignment submission type (primarily Word documents and PDFs), the Firefox browser frequently removes the last annotation when updating the score field in SpeedGrader. This behavior is a Crocodoc-specific limitation within Firefox. To warn about the effects of Firefox and Crocodoc annotations, Canvas displays a warning banner that says aWarning: Crocodoc has limitations when used in Firefox. Comments will not always be saved.a
Work-around: To avoid losing any annotations, instructors may choose to use another browser when providing Crocodoc annotated feedback, or click the screen to retain comments before navigating to another student.