About

Tab Icon Notes is a small, independent site about one thing: Favicons and site icons: what they are, which sizes and file types browsers and phones use, how to add them, and why the old one still shows.

The pages draw on published material such as manufacturers' manuals and specifications, government and university pages, and encyclopedias. Each page lists the sources behind it at the bottom, along with the date it was last checked.

There are no ads here, and nothing is for sale.

What you read here is general information. The maker's own manual or documentation comes first, and where safety or the law calls for a qualified tradesperson, use one.