Dave Anderson on Nostr: Alternatively you could add the extension someone published to the addon store 20 ...

Alternatively you could add the extension someone published to the addon store 20 hours ago that allegedly does this but whose source code link doesn't seem to be a firefox addon and also has 0 installs.

Or you could visit http://tenbluelinks.org/ and install the search engine that way, but be aware the site sets itself as an auto-update source for said engine and so could silently update itself to something unexpected later.