Main page icons (frequently accessed) have been replaced with boxes just containing capital letters. The new icons are not as easily recognisable as the icons normally associated with websites. Some don't reflect the name of the website at all. For example my bank's name starts with the letter T, but its web address starts with I. There's a reason websites choose icons - it's so they're easily recognised. Would love it if Mozilla could at least make those website icons available again, at least as an option.