I think it is a design decision that Firefox and Safari both don't show the favicon (the little icon for a website) next to the bookmark's title on the Bookmark bar.
(for example, if there is a "Google" bookmark on the Bookmark bar, they won't show the small Google icon to the left of the word "Google" on the Bookmark bar)
So I searched and saw that the only way seems to make it work is to install add-on for Firefox? If it is a skin, then I feel more relaxed to use it, but if it is an Add-on, then can't there be potential security risk?
There is also mentioning that if we remove the name (change the name to nothing), then the favicon will show. I tried but it didn't work for some reason.
Any simple way to make it work for Firefox and Safari? Supposedly, a
Preferences -> Appearance -> Show favicons on bookmark bar
will do, but there seems to be no such choice?