112242 - Multiple resolution icon files (favicon.ico) not supported

Status: VERIFIED DUPLICATE of bug 109862

(Core :: Graphics: ImageLib, defect)

Description

[Stephen Ostermiller]

The Microsoft icon file format has the interesting feature of supporting
multiple dimensions and color depths in a single file.  
http://gccprinters.com/favicon.ico has the following:
Width: 16 Height: 16 Colors: 16
Width: 16 Height: 16 Colors: 256
Width: 40 Height: 40 Colors: 16
Width: 40 Height: 40 Colors: 256

The 16x16x16 imagese are particularly small and ugly, yet they are the ones that
mozilla always uses even if others are available.
Microangelo from http://www.impactsoft.com/ is the shareware program that is
usually used to create multiple size/depth images.

It would be nice if mozilla always displayed the 256 color images if available
and displayed the larger sizes if there is enough room.

Interestingly, the latest version of IE (6.0, Windows 98) has the same bug. 
However if you save the GCC icon to a windows folder and look at it in Windows
Explorer from the local hard drive it will look much better.  If you view small
icons, it will have smooth edges because it uses 256 colors, and if you view
large icons, it will user the 40x40x256 version.

Comment 1

[Matthias Versen [:Matti]]

*** This bug has been marked as a duplicate of 109862 ***

Comment 2

[Terri Preston]

Verified Duplicate