I built an extension for Chrome, which I want to use in Firefox. In chrome one can style suggestions using XML-syntax.
Repo containing both Chroem and Firefox versions.
I couldn't find anything for Firefox and was wondering whether it was possible, and if so, how? If it's not possible, are there plans to implement this?
I found these three documentation pages and the omnibox extension example.
At the time of writing (2024-04-17) this is not possible. A bugzilla item has existed for 7 years. This feature has not yet been implemented.