Can I replace the site's name with its icon on the bookmarks bar?

The site icon is only displayed on the panel for bookmarks that don't have a name. To display the favicon on the bookmarks bar instead of the site name:

  1. Make sure the bookmarks bar is turned on. If the panel is disabled, click the key combination Ctrl + Shift + B, to enable it.

  2. Right-click on the bookmark.

  3. In the context menu, select Edit.
  4. In the Bookmark window, clear the Name field.

For more information, see the section Bookmarks.

bookmarks panel
bookmark icon
icon on bookmarks panel