bug 738818 being fixed means only OpenSearch engine searches now happen from the address bar, and I have a feeling the format of these engines doesn't allow for non-domain URLs like data:text/html An example is in the URL field. It's a POST to startpage with search results customised with the "prf" input. A matching search engine with the same preferences of results can of course be created (when bug 862401 is fixed), so such an edge case is likely WONTFIX. I just filed this because I may not be the only one who lovingly customised keyword.URL this way.

(In reply to Mardeg from comment #0) > bug 738818 being fixed means only OpenSearch engine searches now happen from > the address bar, and I have a feeling the format of these engines doesn't > allow for non-domain URLs like data:text/html Indeed, this isn't currently supported. > An example is in the URL field. It's a POST to startpage with search results > customised with the "prf" input. A matching search engine with the same > preferences of results can of course be created (when bug 862401 is fixed), > so such an edge case is likely WONTFIX. Indeed, this is WONTFIX, for the reasons you state!