The following table illustrates major web browsers supporting different features. The version numbers indicate the starting version of a supported feature.
The following table illustrates the image file format support for the favicon.
Browser | ICO | PNG | GIF | animated GIFs | JPEG | APNG | SVG |
---|---|---|---|---|---|---|---|
Firefox | 1.0 | 1.0 | 1.0 | Yes | Yes | 3.0 | No |
Google Chrome | Yes | Yes | 4.0 | 4.0 | 4.0 | No | No |
Internet Explorer | 5.0 | 11.0 | 11.0 | No | No | No | No |
Opera | 7.0 | 7.0 | 7.0 | 7.0 | 7.0 | 9.5 | Dropped |
Safari | Yes | 4.0 | 4.0 | No | 4.0 | No | No |
Additionally, such icon files can be 16×16, 32×32, 48×48, or 64×64 pixels in size, and 8-bit, 24-bit, or 32-bit in color depth. The ICO file format article explains the details for icons with more than 256 colors on various Microsoft Windows platforms.