The discussion centers on the varying appearance of the bookmark icon for the Physics Forum in users' Favorites lists. Users note that sometimes the icon appears as a square root symbol, while at other times it is a generic icon, identified as the vBulletin icon. The conversation highlights the differences in how Internet Explorer (IE) and Firefox handle bookmark icons, with Firefox reportedly retaining icons better than IE, which often defaults to a lowercase "e" for bookmarks after some time. Concerns are raised about the limitations of Firefox, particularly regarding compatibility with certain online banking sites and Windows updates, which are said to function only with IE. Overall, the conversation emphasizes the technical aspects of browser behavior regarding bookmark icons and user preferences between IE and Firefox.