Owl is a light-weight Firefox add-on that makes your reading experience enjoyable by reducing the strain on your eyes, and is ideal for night reading.
- Transform webpages (or local markup files) to use a dark theme
- Choose between two themes (Default and Classic) to suit your needs
- Use different themes on a site-to-site basis
- Selectively Disable Owl on specific websites
- Always use dark theme on specific websites
- Invert PDF files
- Turn on Owl on Firefox startup