chrome window icons

From MDC

Starting with Firefox 1.5, Thunderbird 1.5, and XULRunner 1.8, you can specify an icon for a XUL window by putting files named mywindow.ico (for Windows) and mywindow.xpm (Linux), where mywindow is the id of the <window> you want to attach the icon to, in the chrome/icons/default subfolder of your bundle.

These icons will override the global icon files, which are located in app_dir/chrome/icons/default.

[编辑] Older versions

为了支持早期版本, 比如 Firefox 1.0, 你必须在第一次运行时手工拷贝图标到app_dir/chrome/icons/default (example code).