Google implements this to chrome, and I've used google's implementation to build ontop of their work to provide rich search suggestions in the browser omnibox - https://github.com/AskAlice/search.emu.sh
However, a lot of people are going to be ditching chrome, including me, in the coming months as google enforces Manifest V3, and firefox does not actually support a similar standard from what I can tell. From what I can tell, there is no open standard for rich search suggestions.
here's an example:

I suggest opensearch suggestion specification includes not just text but also metadata-- suggestion text, suggestion URL, suggestion subtitle, suggestion description, and suggestion thumbnail
Google implements this to chrome, and I've used google's implementation to build ontop of their work to provide rich search suggestions in the browser omnibox - https://github.com/AskAlice/search.emu.sh
However, a lot of people are going to be ditching chrome, including me, in the coming months as google enforces Manifest V3, and firefox does not actually support a similar standard from what I can tell. From what I can tell, there is no open standard for rich search suggestions.
here's an example:

I suggest opensearch suggestion specification includes not just text but also metadata-- suggestion text, suggestion URL, suggestion subtitle, suggestion description, and suggestion thumbnail