Known limitations in Timeline

Last updated on Oct 28, 2026

Learn about the limitations you might encounter while working with Timeline in Adobe Firefly.

   Timeline is a beta feature in Adobe Firefly, now available for testing and feedback.

Access to Timeline

Browser compatibility 

Timeline is currently supported on Chrome and Edge browsers. If you're using Firefox, Safari, or any other browser, you may not be able to access all features yet. 

Device compatibility

Timeline is currently compatible with macOS and Windows operating systems, with the following specifications:

  • Macs with Apple silicon (ARM-based) processors
  • Macs with Intel processors
  • Windows machines with Intel processors

Working with Timeline

File size and duration limitation

Each file added to the editor must be under 20 GB in size and no longer than 4 hours in duration. The editor currently does not support files that exceed either the size or time limit.

Video and image files must not exceed a resolution of 4096x4096 pixels to be imported.

Thumbnails not generated for certain videos

Thumbnail generation in the timeline is unavailable for media files with dimensions exceeding 3840 pixels.

Working with GIF and WEBP files

Animated GIF and WEBP files do not retain their animation when added to the timeline. Only the first frame is displayed, even though the file appears animated in the Project media panel.