Favicons are small icons that are displayed next to the websites listed in
the Favorites menu, and help in visually recalling the site you need. Many websites serve up their own icons-these are anchored in the HTML code of the website. If not, the browser always uses its default icon of a page.

You can also specify an icon for a website and protect it so that the browser does not replace it. Here's how you do it: Right-click the desired URL in the Favorites list and select "Properties". Then file for your desired favicon. Confirm the selection with "OK". Now activate the "Read-only" option in the "General" tab and confirm with OK" to make sure it can't be overwritten.