Frame By Frame is a multimedia tool designed for Firefox that enhances video navigation by allowing users to move through frames seamlessly. This subscription-based application focuses on graphic and design needs, giving users the ability to switch frames using the left and right arrow keys. The tool provides essential information such as the current time, total duration, and the number of frames, making it easier to analyze videos in detail.

Users can quickly select videos by simply hovering over them, which streamlines the process of finding the desired content. Additionally, the application allows users to move through frames in increments of ten when holding down the Shift key. The option to hide the Frame By Frame popup with the 'i' key adds to its user-friendly design. Being open source, it invites contributions from the community, further enhancing its capabilities.