User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.9.0.11) Gecko/2009060215 Firefox/3.0.11 (.NET CLR 3.5.30729) Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.9.0.11) Gecko/2009060215 Firefox/3.0.11 (.NET CLR 3.5.30729) In Global.css class "message-icon" points to non-existing image file: chrome://global/skin/icons/Message.png As a result I cannot reuse this class in my extension. Probably the class should point to chrome://global/skin/icons/information-32.png Reproducible: Always

How exactly do you want to use the message-icon class?

In my extension I use my own custom XUL message dialog. It contains a stylesheet reference to chrome://global/skin/, and a XUL <image> for which I set the CSS class to "message-icon". This should allow me to reuse the icon of the active theme. However, the <image> appears empty since the definition for the "message-icon" inside global.css points to a non-existing image: .message-icon { list-style-image: url("chrome://global/skin/icons/Message.png"); } Note that the <image> appears perfectly when I use CSS class "error-icon" or "question-icon" or "alert-icon" since global.css points to existing images. Only "message-icon" is faulty.