The OpenSearch description format can be used to describe the web interface of a search engine. This allows a website to describe a search engine for itself, so that a browser or other client application can use that search engine. OpenSearch is supported by (at least) Firefox, Edge, Safari, and Chrome. (See Reference Material for links to other browsers' documentation.)...to data: URLs), Firefox will reject icons larger than 10 kilobytes... Note: In Firefox, an icon change in the search box indicates...