[Project_owners] dialog icons - Firefox AND Seamonkey question

[Neil]

Eric H. Jung wrote:

>--- Neil <neil at parkwaycc.co.uk> wrote:
>
>>You're right about the id of the document element. In SeaMonkey 1.x, the icon lives in the application's chrome/icons/default directory; in SeaMonkey 2.x, Firefox and Thunderbird you can also provide an icon in an extension's chrome/icons/default directory.
>>    
>>
>Thanks, Neil. Are .xpm files still necessary for the icons to work on Unix/Linux?
>  
>
I don't have a Linux system but I've heard that you can use .png files.