You already know the meaning of the browser icons as well as you know traffic signs. On the other hand on a unknown setting, like a newly installed app, an icon can represent too many things for a person to guess which is the real semantic of the icon in question.
You already know the meaning of the browser icons as well as you know traffic signs. On the other hand on a unknown setting, like a newly installed app, an icon can represent too many things for a person to guess which is the real semantic of the icon in question.