Rated 5 out of 5 stars

Από τον/την Χρήστης Firefox 201f98 στις Δεκ. 12, 2017 · μόνιμος σύνδεσμος

This is the only extension that I could find that would actually add startpage to the "Default Search Engine" menu and not just the shortcut-search-engine menu. Works like a charm.