In bug 1352620, I threw together a quick solution[1] to fix a problem where the autocomplete-rich-result-popup had a hard-coded limit of 20 entries. When we have time, we should probably do this differently. We should probably get rid of the nomaxresults attribute, and instead extend the autocomplete-rich-result-popup binding, and override the maxResults property. [1]: Because Photon / Quantum Flow are currently my top priorities.